PLEASE HELP ASAP! Solve the system of equations by graphing on your own paper. Write the solution as an ordered pair (x, y)
y=2x+1
y=4x-5
Answers
Answer:
Step-by-step explanation:
its 6 2 + 5 = 9-2 = 6
Related Questions
the interval estimate of an individual value of y for a given value of x is the average regression interval. prediction interval estimate. confidence interval estimate. x versus y correlation interval.
Answers
The interval estimate of an individual value of y for a given value of x is called the prediction interval estimate.
The prediction interval estimate provides a range of values within which we can expect an individual y value to fall, given a specific x value. It takes into account both the uncertainty associated with the regression line and the variability in the data. The prediction interval is wider than the confidence interval because it accounts for both the variability around the regression line and the uncertainty in predicting individual values.
In contrast, a confidence interval estimate is used to estimate the true mean value of y for a given value of x. It provides a range of values within which we can expect the average value of y to fall, given a specific x value. The confidence interval takes into account the uncertainty associated with estimating the mean value of y based on the regression line.
Thus, the appropriate answer is the prediction interval estimate.
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1 Use the guidelines opposite to rewrite these expressions.
a) - 2a + 5c
Answers
The opposite expression of "-2a + 5c" is "5c - 2a".
To rewrite the expression "-2a + 5c" using the guidelines opposite, we will reverse the steps taken to simplify the expression.
Reverse the order of the terms: 5c - 2a
Reverse the sign of each term: 5c + (-2a)
After following these guidelines, the expression "-2a + 5c" is rewritten as "5c + (-2a)".
Let's break down the steps:
Reverse the order of the terms
We simply switch the positions of the terms -2a and 5c to get 5c - 2a.
Reverse the sign of each term
We change the sign of each term to its opposite.
The opposite of -2a is +2a, and the opposite of 5c is -5c.
Therefore, we obtain 5c + (-2a).
It is important to note that the expression "5c + (-2a)" is equivalent to "-2a + 5c".
Both expressions represent the same mathematical relationship, but the rewritten form follows the guidelines opposite by reversing the order of terms and changing the sign of each term.
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What is the value of x.
Answers
Answer:
19.8
Step-by-step explanation:
sam can paint a house in 5 hours. gary can do it in 4
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14 + 18 ÷ (2 x 18) - 7 using order of operations
Answers
Answer:
1/2x+7
Step-by-step explanation:
Answer: 11
Step-by-step explanation:
First use a step by step process called BODMAS which stands for brackets of(x) division multiplication additon and subtraction
Please answer this question :)
Answers
Answer:
a) 49.41
b) not quite sure
Step-by-step explanation:
sorry
How do I even figure this out??
Answers
The value of a is 1/64.
The rules of the exponent are
(a) \(a^m*a^n=a^{m+n\)
(b)\(a^m/a^n=a^{m-n\)
(c)\((a^b)^c=a^{bc}\)
(d) \(\sqrt[n]{a}=a^{1/n\)
(e) a⁻ⁿ=1/aⁿ
From the table it is clear that
By the rule of the exponent a⁻ⁿ=1/aⁿ
where a=2
2⁻¹ = 1/2¹ = 1/2
2⁻² =1/2² =1/4
2⁻³ =1/2³ =1/8
2⁻⁴ =1/2⁴ =1/16
2⁻⁵ =1/2⁵ =1/32
So we have to calculate the left one where it is given that we have to estimate the value for 2⁻⁶ which is a.
From the above, it is clear that 2⁻ⁿ =1/2ⁿ
using the above formula
2⁻⁶= 1/2⁶ =1/64= a
Therefore the value of a is 1/64.
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the table represents a linear function what is the slope of the function
Answers
Answer:
-6
Step-by-step explanation:
2-8
——
-1- -2
So you do 2-8 and get -6 then you do -1- -2 and get 1. Next you do -6 divide 1 and the answer you get is -6.
Use the suggested substitution to write the expression as a
trigonometric expression. Simplify your answer as much as possible.
Assume 0≤θ≤π2.
√1−x^2, x=cos(θ)
Answers
The expression √1−x^2, with the substitution x=cos(θ), can be simplified to sin(θ).
To write the expression as a trigonometric expression using the suggested substitution, we will replace x with cos(θ) in the expression. This gives us:
√1−cos^2(θ)
Now, we can use the Pythagorean identity, sin^2(θ) + cos^2(θ) = 1, to simplify the expression further. Rearranging the identity, we get:
sin^2(θ) = 1 - cos^2(θ)
Substituting this back into our original expression, we get:
√sin^2(θ)
Taking the square root of both sides, we get:
sin(θ)
Therefore, the expression √1−x^2, with the substitution x=cos(θ), can be simplified to sin(θ).
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Thank you to anyone who answers .
Answers
Answer:
d) 2 tons plus 1,200 pounds.
Step-by-step explanation:
1 ton = 2000
2000 + 2000 = 4000
5200 - 4000
= 1200
hence, the answer is 2 tons plus 1,200 pounds.
hope this helps and is right :)
pls help ill give brainliest i put pictute down
Answers
Answer:
Option D
Step-by-step explanation:
Given the following question:
Airline makes $98,410
Truck driver makes $38,200
Annually means in a year so the airline makes $98,410 and the truck driver makes $38,200 in a year.
Now in order to find the amount the two make in 20 years we have to multiply:
\(98410\times20=1968200\)
\(38200\times20=764000\)
Now since the question asks "how much MORE" does the airline make we have to subtract:
\(1968200-764000=1204200\)
\(=1204200\)
The airline makes "$1,204,200 more dollars" than the truck driver, or option D.
Hope this helps.
Answer:
The answer is either D or B
Step-by-step explanation:
98,410 x 20 is 1,968,200 so
it might be closer to D or B instead.
Sorry if this is wrong.
But If it is right Can I get brainlest pls.
Which statement describes the expression shown above? 6 times the sum of 2 and 8 ) plus the sum of 6 and 8 ) 8 plus the product of 6 and x The sum of 6c and 8
Answers
The expression described the "6 times the sum of 2 and 8" plus "the sum of 6 and 8" plus "8 plus the product of 6 and x."
To break it down further, the expression can be written as:
6 * (2 + 8) + (6 + 8) + (8 + 6x)
The first part, "6 times the sum of 2 and 8," is represented by 6 * (2 + 8). It calculates the sum of 2 and 8 (which is 10) and then multiplies it by 6.
The second part, "the sum of 6 and 8," is simply (6 + 8).
The third part, "8 plus the product of 6 and x," is represented by (8 + 6x). It multiplies 6 by the value of x and then adds 8 to it.
Overall, the expression involves adding and multiplying various numbers and variables according to the given operations.
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Raheel is comparing the cost of two parking garages. Garage A charges a flat fee of $6 per car plus $0.50 per hour. Garage B charges a flat fee of $2 per car plus $1 per hour.
Answers
Answer:
$6 + .50x = $2 + $1.00x
4 = .50x
8hr = x, the number of hours when both garages cost the same amount
$6 + .50 x 8 =
$10 would be the cost a both garages after 8 hours
Step-by-step explanation:
#A
Flat fee=6Rate of change=0.5Equation in slope intercept form
y=mx+by=0.5x+6#B
Flat fee=2$Rate of change=1Equation in slope intercept form
y=x+2Now for compare take any no
Let's take 10
For garage A
y=0.5(10)+6=5+6=11$For garage B
y=10+2=12$Hence Garage B is charging more
Consider the following vector field.
F(x, y, z) =
9ex sin(y), 2ey sin(z), 8ez
sin(x)
(a)
Find the curl of the vector field.
curl(F) =
(b)
Find the divergence of the vector field.
div(F) =
Answers
The curl of the vector field
curl(F) = -2ey cos(z)i + 8ez cos(x)j - 9ex cos(y)k
The divergence of the vector field
div(F) = 9e^x sin(y) + 2e^y sin(z) + 8e^z
To find the curl of the vector field F(x, y, z) = 9ex sin(y), 2ey sin(z), 8ez sin(x), we need to compute the determinant of the curl matrix.
(a) Curl of F:
The curl of a vector field F = P(x, y, z)i + Q(x, y, z)j + R(x, y, z)k is given by the following formula:
curl(F) = (∂R/∂y - ∂Q/∂z)i + (∂P/∂z - ∂R/∂x)j + (∂Q/∂x - ∂P/∂y)k
In this case, we have:
P(x, y, z) = 9ex sin(y)
Q(x, y, z) = 2ey sin(z)
R(x, y, z) = 8ez sin(x)
Taking the partial derivatives, we get:
∂P/∂y = 9ex cos(y)
∂Q/∂z = 2ey cos(z)
∂R/∂x = 8ez cos(x)
∂R/∂y = 0 (no y-dependence in R)
∂Q/∂x = 0 (no x-dependence in Q)
∂P/∂z = 0 (no z-dependence in P)
Substituting these values into the curl formula, we have:
curl(F) = (0 - 2ey cos(z))i + (8ez cos(x) - 0)j + (0 - 9ex cos(y))k
= -2ey cos(z)i + 8ez cos(x)j - 9ex cos(y)k
Therefore, the curl of the vector field F is given by:
curl(F) = -2ey cos(z)i + 8ez cos(x)j - 9ex cos(y)k
(b) Divergence of F:
The divergence of a vector field F = P(x, y, z)i + Q(x, y, z)j + R(x, y, z)k is given by the following formula:
div(F) = ∂P/∂x + ∂Q/∂y + ∂R/∂z
In this case, we have:
∂P/∂x = 9e^x sin(y)
∂Q/∂y = 2e^y sin(z)
∂R/∂z = 8e^z
Substituting these values into the divergence formula, we have:
div(F) = 9e^x sin(y) + 2e^y sin(z) + 8e^z
Therefore, the divergence of the vector field F is given by:
div(F) = 9e^x sin(y) + 2e^y sin(z) + 8e^z
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Divide using long division. Check your answers.t(2 ³-3x²- 18 x-8) / (x-4) .
Answers
The quotient is 2³t - 5tx² - 6tx + 9t - 2 and the remainder is 10t + 40.
To divide t(2³ - 3x² - 18x - 8) by (x - 4), we follow the long division process.
First, we divide 2³t by x, which gives us 2³t. Then, we multiply (x - 4) by 2³t, resulting in 2³tx - 8t. We subtract this from the original expression to get -5tx² - 18x - 8t.
Next, we divide -5tx² by x, giving us -5tx. Multiplying (x - 4) by -5tx, we get -5tx² + 20tx.
Subtracting this from the previous result, we obtain -18x - 20tx - 8t. We continue this process until we cannot divide further.
The final quotient is 2³t - 5tx² - 6tx + 9t - 2, and the remainder is 10t + 40.
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A paint mixer wants to mix paint that is 40% gloss with paint that is 25% gloss to make 5. 25 gallons of paint that is 30% gloss. How many gallons of each paint should the paint mixer mix together?.
Answers
It needs 1 \(\frac{3}{4}\)gallons of 40% gloss and 3 \(\frac{1}{2}\) gloss gallons of 25% gloss.
System of equations is a set or collection of equations that are dealt together. These equations can be solved graphically and algebraically. The point where two lines intersect is the solution to the system of equations. This article elaborates on Algebraic Technique To Solve System Of Equations.A linear equation is the one which has one or more variables and when plotted gives a straight line. Two or more linear equations consisting of two or more variables such that all equations are considered at the same time is called the system of linear equations.
Asume it needs x gallons of 40% gloss and y gallons of 25% glass
x+y=5.25
40% X+25% y = 30%×5.25
So x+y=5.25 ----------(i)
0.4x+0.25y = 15.75----------(ii)
(ii)*4 - (i)
4*(0.4x+0.25) - (x+y)=15.75*4 - 5.25
0.6x=1.05 (elimination y)
x=1.75=1 \(\frac{3}{4}\) So
y=5.25-X=3.5 = 3 \(\frac{1}{2}\)
So,it needs 1 \(\frac{3}{4}\) gallons of 40% gloss and 3 \(\frac{1}{2}\) glass gallons of 25% gloss.
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To mix paint that is 40% gloss with paint that is 25% gloss to make 5.25 gallons of paint that is 30% gloss, the paint mixer should mix 1.75 gallons of paint that is 40% gloss with 3.5 gallons of paint that is 25% gloss.
Let x be the number of gallons of paint that is 40% gloss and y be the number of gallons of paint that is 25% gloss. To mix paint that is 40% gloss with paint that is 25% gloss to make 5.25 gallons of paint that is 30% gloss, we can set up the following system of equations:
0.40x + 0.25y = 0.30 × 5.25
x + y = 5.25
To solve this system of equations, we can first multiply the second equation by 0.4 to eliminate the x term, and then we can subtract the first equation from the resulting equation to solve for y:
0.4x + 0.25y = 0.3×5.25
0.4x + 0.4y = 0.4×5.25
0.15y = 0.1×5.25 = 0.525
y = 0.525/ 0.15
y = 3.5
Then we can substitute this value of y back into one of the original equations to solve for x:
x = 5.25 - y
x = 5.25 - 3.5
x = 1.75
Therefore, the paint mixer should mix 1.75 gallons of paint that is 40% gloss with 3.5 gallons of paint that is 25% gloss to make 5.25 gallons of paint that is 30% gloss.
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write 40/17
as a decimal rounded to the nearest hundredth.
Answers
I even tried this and couldn't figure it out
graph each linear inequality (3.)x-y>5 m= , b=(5.) y ≥ -5/3 x + 1. m=. b= -2x+y<5 m=. b=(7.) 4x-2y -8. m=. b=2x-y<4 5. m=. b=
Answers
For a equation of the form:
\(\begin{gathered} y=mx+b \\ or \\ ymx+b \\ or \\ y\le mx+b \\ or \\ y\ge mx+b \end{gathered}\)m = slope
b = y-intercept
for:
\(\begin{gathered} x-y>5 \\ \text{solve for y:} \\ y-------(5)
\(\begin{gathered} y\ge-\frac{5}{3}x+1 \\ m=-\frac{5}{3} \\ b=1 \\ ----- \\ y<2x+5 \\ m=2 \\ b=5 \end{gathered}\)(7)
\(\begin{gathered} y<2x+4 \\ so\colon \\ m=2 \\ b=4 \\ ------- \\ y<2x+5 \\ so\colon \\ m=2 \\ b=5 \end{gathered}\)
the sum of two numbers is 41. the smaller number is 19 less than the larger number. what are the numbers?
Answers
Answer:
30, 11
Step-by-step explanation:
x+x-19=41
2x=41+19=60
x=60/2=30
x-19=11
For the following system, if you isolated x in the first equation to use the substitution method, what expression would you substitute into the second equation? −x + 2y = −6 3x + y = 8
Answers
Answer:
\(x=2y+6\)
Step-by-step explanation:
So we have the system:
\(-x+2y=-6\\3x+y=8\)
If we isolate the x-variable in the first equation:
\(-x+2y=-6\)
Subtract 2y from both sides:
\(-x=-6-2y\)
Divide both sides by -1:
\(x=2y+6\)
Therefore, we would substitute the above into the second equation:
\(3x+y=8\\3(2y+6)+y=8\)
The answer is 2y+6
Further notes:
To solve for the system, distribute:
\(6y+18+y=8\)
Simplify:
\(7y+18=8\)
Subtract:
\(7y=-10\)
Divide:
\(y=-10/7\approx-1.4286\)
Now, substitute this value back into the isolated equation:
\(x=2(-10/7)+6\\x=-20/7+42/7\\x=22/7\approx3.1429\)
Step-by-step explanation:
Start by solving the equation for x (☓)
\( - x + 2y = 6 \\ \: \: \: \: \: 3 + y = 8\)
\(x = 6 + 2y\)
Substitute the given value of x for the equation 3 + y = 8\(3(6 + 2y) + y = 8\)
solve the equation for y\(y = - \frac{10}{7} \)
substitute the given value of y into the equation x = 6 + 2\(x = 6 + 2 \times ( - \frac{10}{7} )\)
solve the equation for x\(x = \frac{22}{7} \)
The possible solution of the system is the ordered pair (x,y)\( (\frac{22}{7} . - \frac{10}{7} )\)
The dot (.) in the center is supposed to be a comma but the scientific keyboard does not support a comma\((x.y) \: \: ( \frac{22}{7} . - \frac{10}{7} )\)
This is the solution Marnie out!Dylan walks into a video arcade with a pocketful of quarters. He spends them at a rate of nine every half hour until he runs out. If the amount of quarters Dylan has is graphed over time, which feature of the graph corresponds to Dylan’s initial amount of quarters, before he spends the first one? *
Answers
Answer: The answer is A, y-intercept.
Step-by-step explanation:
It is recognized that cigarette smoking has a deleterious effect on lung function. In a study of the effect of cigarette smoking on the carbon monoxide diffusing capacity (DL) of the lung, researchers found that current smokers had DL readings significantly lower than those of either ex-smokers or non-smokers. The carbon monoxide diffusing capacities for a random sample of n = 20 current smokers are listed here: 103.768 92.295 100.615 102.754 a. b. 88.602 61.675 88.017 108.579 C. 73.003 90.677 71.210 73.154 The above random sample produces a mean of 89.85475 and a standard deviation of 14.9035. Do these data indicate that the mean DL reading for current smokers is significantly lower than 100 DL, the average for non-smokers? Use a = 0.01. State the null and alternative hypotheses needed to verify the claim. Test the null hypothesis. Interpret your result in a practical sense. Find a 95% upper one-sided confidence interval for the mean DL reading for current smokers. Does this bound confirm your conclusions in part a? 123.086 84.023 82.115 106.755 91.052 76.014 89.222 90.479
Answers
Based on the hypothesis test and the confidence interval, there is evidence to support the claim that the mean DL reading for current smokers is significantly lower than 100 DL.
To assess the claim, we set up the null hypothesis (H₀) as the mean DL reading for current smokers being equal to or greater than 100 DL. The alternative hypothesis (H₁) states that the mean DL reading for current smokers is lower than 100 DL.
By performing a hypothesis test using the given sample data, we calculate the sample mean of 89.85475 and the sample standard deviation of 14.9035. Since the sample size is less than 30 and the population standard deviation is unknown, we employ a t-test. With a significance level (α) of 0.01, we compare the t-value obtained from the data to the critical t-value.
If the calculated t-value falls in the critical region, we reject the null hypothesis in favor of the alternative hypothesis. In this case, the calculated t-value falls in the critical region, indicating that the mean DL reading for current smokers is significantly lower than 100 DL.
Furthermore, a 95% upper one-sided confidence interval is computed to estimate the upper bound for the mean DL reading of current smokers. This interval provides an estimate that suggests the mean DL reading is below 100 DL.
Therefore, based on the hypothesis test and the confidence interval, there is evidence to support the claim that the mean DL reading for current smokers is significantly lower than 100 DL.
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Which of the following triangles could lie on the graph with the same rise over run in Question # 3?
A. A triangle with a rise of 10 and a run of 30
B. A triangle with a rise of 30 and a run of 10
C. A triangle with a rise of 10 and a run of 40
D. A triangle with a rise of 2 and a run of 5
Answers
Answer:
B.
Step-by-step explanation:
9) Malick has $235. He has one less than three times as many $10 bills than $5 bills. Find how many of each bill that he has.
Answers
7 bills of $5 and 20 bills of $10
Explanation
Step 1
Let
Malick has $235=total = 235
total=235
number of bill $5= x
number of bill $10=y
He has one less than three times as many $10 bills than $5 bills=
3x=y+1
\(3x=y+1\text{ Equation (1)}\)Step 2
the total is 235, so
total for $ 5 bills= 5* number of bills $5=5x
total for $ 10 bills= 10* number of bills $10=10x
\(5x+10y=235\text{ Equation(2)}\)Step 2
using equation (1I and (2) solve for x and y
\(\begin{gathered} 3x=y+1 \\ 5x+10y=235 \end{gathered}\)isolate, y in equation (1)
\(\begin{gathered} 3x=y+1 \\ \text{divide each side by 3} \\ \frac{3x}{3}=\frac{y}{3}+\frac{1}{3} \\ x=\frac{y}{3}+\frac{1}{3} \end{gathered}\)replace the value of x in equation (2)
\(\begin{gathered} 5x+10y=235 \\ 5(\frac{y}{3}+\frac{1}{3})+10y=235 \\ \frac{5y}{3}+\frac{5}{3}+10y=235 \\ y(\frac{5}{3}+\frac{10}{})=235-\frac{5}{3} \\ \\ y(\frac{35}{3})=233.33 \\ y=\frac{233.33\cdot3}{35} \\ y=20 \end{gathered}\)replace the value of y in equation (1) to fin d x
\(\begin{gathered} 3x=y+1 \\ 3x=20+1 \\ 3x=21 \\ \text{divide by 3} \\ \frac{3x}{3}=\frac{21}{3} \\ x=7 \end{gathered}\)so, the answer is
7 bills of $5 and 20 bills of $10
please choose the right one will give brainliest
Answers
Answer:
SUM!
Step-by-step explanation:
Sum because I saw the plus sign in the equation!
En una muestra de 50 restaurantes de comida rápida, la venta media fue de $3.000, y la desviación estándar, $200. El intervalo de confianza del 95% es
Answers
Respuesta:
(2945.411; 3054.589)
Explicación paso a paso:
Dado ;
Tamaño de la muestra, n = 50
Media, xbar = 3000
Desviación estándar, s = 200
Nivel de confianza, Zcrítico al 95% = 1,96
El intervalo de confianza se define como:
Xbar ± margen de error
Margen de error = Zcrítico * s / sqrt (n)
Margen de error = 1,96 * 200 / sqrt (50)
Margen de error = 54.589
Límite inferior = (3000 - 54.589) = 2945.411
Límite superior = (3000 + 54.589) = 3054.589
(2945.411; 3054.589)
a student organization of 10 wants to select a president, a vice-president, and a treasurer. how many different leadership assignments are possible?
Answers
There are 720 different leadership assignments possible for the student organization.
To determine the number of different leadership assignments possible, we need to calculate the number of permutations for selecting the president, vice-president, and treasurer from a group of 10 students.
For the first position of president, there are 10 students to choose from. Once the president is selected, there are 9 remaining students for the position of vice-president. Finally, for the position of treasurer, there are 8 remaining students.
To find the total number of different leadership assignments, we multiply the number of choices for each position:
Total number of assignments = 10 * 9 * 8 = 720
Therefore, there are 720 different leadership assignments possible for the student organization.
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A robot can complete 8 tasks in 3/5
hour. Each task takes the same amount of time.
How many tasks can the robot complete in one hour?
Answers
Explanation: Just divide 36 by 24 to get 1.5 and divide 8 by 1.5 to get about 5. Then add 8 + 5 to get 13 the final result. So it’s 13 tasks. Sorry if I got it wrong.
Kim earns $25.00 per hour at her job. How much money will Kim earn if she works
for 8.5 hours?
Answers
Answer:
$212.50
Step-by-step explanation:
So you have to multiply 8.5 by 25 because for every hour she gets $25. And if she works for 8.5 hours then you multiply both numbers to get your answer.
Hope this helps!
When adding or subtracting mixed numbers with like denominators, the numerators ___ , but the denominators ______ .
A. Stay the same
B. change
Answers
Answer:
Yo, when you adding or subtracting mixed numbers with the same denominators, the numerators stay chill, they don't change, bro.
But the denominators, they also stay the same, man. It's like keeping things consistent, ya feel me? So the answer is A, dude. Numerators stay put, denominators stay put. It's all good vibes, bro! ✌️