Add the following expressions:
(4d - 3f) + (-2d - 7f)
Answers
Answer:
2d+[-10]
Step-by-step explanation:
Answer:
2d-10f
Step-by-step explanation:
You add like terms so 4d-2d gets you 2d, then add like terms again so -3f-7f gets you -10f.
Related Questions
I forgot how to do this. I will give brainliest!
Answers
Answer:
A = 2, B = 3 and C = 4
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Given
2x + 3y = 2 ( subtract 2x from both sides )
3y = - 2x + 2 ( divide all terms by 3 )
y = - \(\frac{2}{3}\) x + \(\frac{2}{3}\) ← in slope- intercept form
with slope m = - \(\frac{2}{3}\)
Parallel lines have equal slopes, thus
y = - \(\frac{2}{3}\) x + c ← is the partial equation
To find c substitute (2, 0) into the partial equation
0 = - \(\frac{4}{3}\) + c ⇒ c = \(\frac{4}{3}\)
y = - \(\frac{2}{3}\) x + \(\frac{4}{3}\) ← in slope- intercept form
Multiply through by 3
3y = - 2x + 4 ( add 2x to both sides )
2x + 3y = 4 ← in standard form
with A = 2, B = 3 and C = 4
5. The sample mean weight of 65 adult African elephants was measured to be 14,325.62 pounds, with a standard deviation of 872.71 pounds. Using a 10% level of significance, what could we
claim about the population mean weight for all African elephants so that the hypothesis will not be rejected?
He:-13995.2 lbs
OH-14184.9 lbs
OH:14505.7 lbs
He: p=14128.3 lbs
Answers
Based on the information, we can claim that the population mean weight for all African elephants is between 13,995.2 pounds and 14,505.7 pounds.
How to explain the informationThe sample mean weight of 65 adult African elephants was measured to be 14,325.62 pounds, with a standard deviation of 872.71 pounds. Using a 10% level of significance, we could claim that the population mean weight for all African elephants is between 13,995.2 pounds and 14,505.7 pounds.
This is because the 90% confidence interval for the population mean weight is 13,995.2 to 14,505.7. The 90% confidence interval is the range of values that we are 90% confident contains the population mean weight. In other words, if we were to take a sample of 65 adult African elephants many times, 90% of the time the sample mean weight would fall within the 90% confidence interval.
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Which expression is equivalent to (x-4y/x-9y5)-2
•y8/x10
•x5/y7
•x5/y4
•x/y7
Answers
Answer:
y8/x10
Step-by-step explanation:
Answer:
a
Step-by-step explanation:
cause math
can someone please help me with this question?
Answers
Answer:
6x + y = 24
Step-by-step explanation:
that is the procedure above
If f(x)=2x+7 and g(x)= x^2-4/2x+1 then g(f(-5))?
a)-3
b)6
c)-1
d)2
Answers
Answer:
It should be 2
Step-by-step explanation:
I searched it up
The value of the g(f(-5)) is -1 f(x)=2x+7 and g(x)= x^2-4/2x+1 then g(f(-5)) option (c) is correct.
What is a function?It is defined as a special type of relationship and they have a predefined domain and range according to the function every value in the domain is related to exactly one value in the range.
We have:
f(x) = 2x+7 and
\(\rm g(x) = \frac{x^2-4}{2x+1}\)
First calculating f(-5)
f(-5) = 2(-5) + 7 = -3
Putting x = -3 in the g(x)
\(\rm g(-3) = \frac{-3^2-4}{2(-3)+1}\)
g(-3) = 5/(-5)
g(-3) = -1
Thus, the value of the g(f(-5)) is -1 f(x)=2x+7 and g(x)= x^2-4/2x+1 then g(f(-5)) option (c) is correct.
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Express the confidence interval 0.039 < p < 0.479 in the form p± E. A. 0.22 ±0.5 B. 0.259 ±0.5 C. 0.259 ±0.44
D. 0.259 ±0.22
Answers
Answer:
Step-by-step explanation:
To express the confidence interval 0.039 < p < 0.479 in the form p ± E, we need to find the midpoint of the interval and half of the width.
The midpoint of the interval is the average of the lower and upper bounds:
Midpoint = (0.039 + 0.479) / 2 = 0.259
The width of the interval is the difference between the upper and lower bounds:
Width = 0.479 - 0.039 = 0.44
Half of the width is obtained by dividing the width by 2:
Half Width = 0.44 / 2 = 0.22
Therefore, the confidence interval 0.039 < p < 0.479 can be expressed as:
p ± E = 0.259 ± 0.22
So, the correct option is:
D. 0.259 ± 0.22
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What is the value of x if k=e(y−z),k=1.7×10−5 and y=1360. Recall that ln(e2)=z. a) 1.49×104 b) −1,49×104 C) 8.08×10−3 d) −8.08×10−3
Answers
the appropriate significant figures, the value of x is approximately 1.49 × \(10^3.\) Therefore, the correct option is (a 1.49 × \(10^4.\)
To find the value of x, we'll use the given equations and the properties of logarithms. Let's go step by step:
We know that ln\((e^2)\) = z. Using the property that ln\((e^a\)) = a, we can rewrite this equation as z = 2.We are given the value of k as k =\(e^(^y^-^z\)). Substituting the values of y and z, we get k ).\(e^(1360 - 2).\)We know k = 1.7 × \(10^(^-^5^)\). So we can write the equation as 1.7 × 10^(-5) = e^(13\(= e^(^1^3^6^0^ ^- 2\)60 - 2).To isolate the exponential term, we'll take the natural logarithm (ln) on both sides of the equation: ln(1.7 × \(10^(^-^5^)\)) = ln(\(e^(^1^3^6^0^ ^-^ 2^)\)).Using the property that ln(e^a) = a, the equation simplifies to ln(1.7 × 10^(-5)) = 1360 - 2.Now we can solve for x by rearranging the equation: x = 1360 - 2 - ln(1.7 × \(10^(-5)).\)Calculating the expression on the right side of the equation:
x = 1360 - 2 - ln(1.7 ×\(10^(-5\)))
x ≈ 1358 - ln(1.7) - ln\((10^(-5)\))
x ≈ 1358 - ln(1.7) - (-5)ln(10) [Using ln\((a^b\)) = b * ln(a)]
x ≈ 1358 - ln(1.7) + 5ln(10) [Since ln(10) = 1]
Using a calculator, we can find ln(1.7) ≈ 0.5306 and ln(10) ≈ 2.3026:
x ≈ 1358 - 0.5306 + 5(2.3026)
x ≈ 1358 - 0.5306 + 11.513
x ≈ 1369.9824
Rounded to the appropriate significant figures, the value of x is approximately 1.49 × \(10^3\). Therefore, the correct option is (a) 1.49 × \(10^4.\)
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It costs $22 to get a pass at a ski report, plus $5.50 each hour to rent skis. Another ski resort charges $18 for a pass and $7.20 per hour to rent skis. Find the number of hours for which the costs are the same. Round your answer to the nearest half hour.
Answers
ski resort 1: 5.50x +22
ski resort 2: 7.20x +18
(x represents the number of hours)
set the equations equal to find when the costs are the same
5.50x+22=7.20x+18
solve for x (subtract 5.50x from both sides, subtract 18 from both sides)
4=1.7x (divide by 1.7)
2.4=x
in 2 and a half hours the cost would be the same
6. Kriti has a circular swimming pool in her house. The radius of the swimming
pool is22.5 cm. She walks one round every morning before diving in the pool.
How far does she walk around the pool every morning? *
70.65
141.3
35.33
282.6
Answers
Answer:
Total walk she did around the pool every morning = 141.3
Step-by-step explanation:
Given - Kriti has a circular swimming pool in her house. The radius of the swimming pool is 22.5 cm. She walks one round every morning before diving in the pool.
To find - How far does she walk around the pool every morning?
Proof -
Given that, the swimming pool is circular in shape.
So,
1 round of circle = Circumference of circle.
As we know that,
Circumference = \(2\pi r\)
= \(2*\pi *22.5\)
= 141.3
∴ we get
Total walk she did around the pool every morning = 141.3
Use the distributive property to write an equivalent expression.
7 g + 2h)
Answer:
Submit Answer
Answers
Answer:
7g + 14h
Step-by-step explanation:
7 (g + 2h)
7 x g + 7 x 2h
7g + 14h
Emma but two identical bottles of shampoo. She uses 3/8 of one of them at home, and uses 7/10 of all of the remaining while she’s on Hollidays. In total, how much shampoo remains?
Answers
Answer:
37/40
Step-by-step explanation:
3/8 7/10
80/40 - 15/40 - 28/40 = 37/40
two whole shampoo - uses at home - uses on holiday = left
SHOW YOUR WORK FOR CREDIT!
2. 9(1 − 3n)
A) 3n + 35
B) −5n + 35
C) −5n − 10
D) 9 − 27n 3)
Answers
9-9(3n)
9-27n
Can’t be solved
Match the result of solving an equation to the number of solutions the equation has
3 = 3
no solution
6 = 3
infinitely many solutions
one solution
x=3
Answers
Answer:
x=3 is one solution
3=3 has infinitely solutions
6=3 has one solutions.
Step-by-step explanation:
I got it correctt on Edg.
Answer: x = 3 one solution
3=3 infinitely many solutions
6=3 no solution
BIG BRAIN KIDS ONLY
Given the relation {(11, 3), (-10, -7), (-7, 13), (-5, -2), (-9, -6)}, determine the domain.
A. {-10, -7, 5, 9, 11}
B. {-7, -6, -2, 11, 13}
C. {-10, -9, -7, -5, 11}
D. {-6, -5, -10, 11, -3}
Answers
Answer:
THE ANDER IS EHE DUDUDUSU
angle is constructed with its base on the x-axis and its upper two vertices on the parabola . what are the dimensions of the rectangle with the maximum area? what is the area?'
Answers
The double integral of sin(xy) over the rectangle r equals 1 when a is approximately equal to 0.986, with 0 ≤ a ≤ π.
The iterated integral to compute the double integral over the rectangle r = {(x,y) : 0 ≤ x ≤ π, 0 ≤ y ≤ a} of sin(xy) is given by:
∫∫r sin(xy) dA = ∫₀^a ∫₀^π sin(xy) dx dy
Integrating with respect to x first, we have:
∫₀^a ∫₀^π sin(xy) dx dy = ∫₀^a [-cos(πy) + cos(0)] dy
= ∫₀^a (1 - (-1)^n) dy
= a - (a/π)sin(πa)
For what values of a is ∫∫r sin(xy) dA equal to 1?
We need to solve the equation:
a - (a/π)sin(πa) = 1
Multiplying both sides by π, we get:
aπ - a sin(πa) = π
Now, let f(a) = aπ - a sin(πa) - π. We need to find the values of a such that f(a) = 0.
Using numerical methods, we can find that there is only one solution in the interval [0,π], which is approximately a = 0.986.
Therefore, the double integral of sin(xy) over the rectangle r equals 1 when a is approximately equal to 0.986, with 0 ≤ a ≤ π.
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The acceleration of a moving particle in space is given by the vector equation a(t) = 4ti + 6t j + k , t> O. Find the velocity of the partice at time t given that v(0) = i - j + k Ov(t) = (2+2 + 1) i + (3+2 - 1) j + (t + 1) k (v(t) = (2+2 + 1) i + (3+2 + 2) j + (t + 1) k Ov(t) = (2+2 - 1) i + (3+2 + 1) j + (t - 1) k (v(t) = (2+2 - 1) i + (3+2 - 1) j - (t + 1) k Ov(t) = 4i+ 6j
Answers
The velocity of the particle at time t is given by v(t) = (2t² + 1)i + (3t² - 1)j + (tk + 1)k, where t is the time. It represents the motion of the particle in three-dimensional space.
To find the velocity of the particle at time t, we need to integrate the acceleration vector with respect to time.
To find the velocity vector v(t), we integrate each component of the acceleration vector:
∫a(t) dt = ∫(4ti + 6tj + k) dt
Integrating each component separately:
∫(4ti) dt = 2t²i + C₁
∫(6tj) dt = 3t²j + C₁
∫k dt = tk + C₃
where C₁, C₂, and C₃ are constants of integration.
Combining the integrals, we have:
v(t) = (2t² + C₁)i + (3t² + C₂)j + (tk + C₃)k
Given that v(0) = i - j + k, we can substitute t = 0 into the velocity equation:
v(0) = (2(0)² + C1)i + (3(0)² + C₂)j + (0k + C₃)k
i - j + k = C₁i + C₂j + C₃k
Comparing the coefficients, we get:
C₁ = 1
C₂ = -1
C₃ = 1
Substituting these values back into the velocity equation:
v(t) = (2t² + 1)i + (3t² - 1)j + (tk + 1)k
Therefore, the velocity of the particle at time t is given by:
v(t) = (2t² + 1)i + (3t² - 1)j + (tk + 1)k
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What percent is represented by the shaded area?
Answers
because 6 out of the 20 squares are shaded so it would be 6/20 which would equal .30 or 30%
Last one for today. Please help
Answers
Answer:
D) (-2,0)
Step-by-step explanation:
(-2,0)
(-2-2)²+(y+3)²=25
16+9=25
25=25
write an equation in slope-intercept form of the line perpendicular to y= -1/5x + 1/4 that passes through the point (3,4)
Answers
Answer: y=5x-11
Step-by-step explanation:
y=5x-11 is the equation of the line perpendicular to y= -1/5x + 1/4 that passes through the point (3,4).
What is Slope of Line?The slope of the line is the ratio of the rise to the run, or rise divided by the run. It describes the steepness of line in the coordinate plane.
The slope intercept form of a line is y=mx+b, where m is slope and b is the y intercept.
The slope of line passing through two points (x₁, y₁) and (x₂, y₂) is
m=y₂-y₁/x₂-x₁
The given equation of line is y= -1/5x + 1/4
The slope of the perpendicular line is 5.
We need to find line perpendicular to y= -1/5x + 1/4 that passes through the point (3,4)
4=5(3)+b
-11=b
Hence, y=5x-11 is the equation of the line perpendicular to y= -1/5x + 1/4 that passes through the point (3,4).
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Solve for p if 2lpl = 4
O {-8, 8)
O{-4, 4)
O (-2, 2)
Answers
Answer:
Step-by-step explanation:
2|p|= 4
2p = 4
p = 2
-2p = 4
p = -2
(-2, 2)
Find the equation of the line parallel to y=4x+1 that also intersects the point (1,1)
y=4x+?
Answers
Answer:8
Step-by-step explanation:
DeAndre downloaded 8 apps onto his tablet in 12 seconds. At this rate, how many apps could he download in one minute? (12 seconds = 15 minute)
Answers
Answer:
I think 3 or 4 but I doubt it
Step-by-step explanation:
Answer:
40
I got it wrong with all the other answer RIP :c
Which of the following means a study used a bivariate correlational design?
a. presence of measured variables
b. use of correlational stats
c. inclusion of quantitative variables
d. depiction of bar graph
Answers
among the given options, the use of correlational statistics OPTION B is the most reliable indicator that a study employed a bivariate correlational design.
A bivariate correlational design is characterized by the examination of the relationship between two quantitative variables. In this context, the use of correlational statistics is a key indicator of this design. Correlational statistics, such as correlation coefficients (e.g., Pearson's r), are employed to assess the strength and direction of the relationship between the variables under investigation.
The presence of measured variables, inclusion of quantitative variables, or depiction of a bar graph are not definitive indicators of a bivariate correlational design. Measured variables can be present in various study designs, including experimental ones. Similarly, quantitative variables can be utilized in different types of studies, such as experimental, quasi-experimental, or observational designs. The depiction of a bar graph, which is commonly used to illustrate categorical data, does not inherently imply the use of a bivariate correlational design.
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find the domain & range, pls helpp
Answers
Answer:
Domain: 1, 6
Range: 4
Step-by-step explanation:
The Domain is the first coordinate which is x
The Range is the second coordinate which is y
The domain is the set of departure of a function into constrained to fall it is the sex X in the notation f:X-Y and is denoted as dom. The range is set of data is the diffrence between largest and smallest values so The domain is 1,6 and range is 4
After a 2 1/2 hour rainstorm, there are 5 inches of water in a bucket outside. What is the rate per inch?
Answers
Answer:
2 inches per hour
Step-by-step explanation:
2 1/2 hours is equivalent to 150 minutes.
Set up a proportion; let x equal inches of rain
\(\frac{5}{150}\)=\(\frac{x}{60}\)
Cross multiply -> 150x=300
Divide both sides by 150 to get -> x=2
Jessica drove 425 miles to her grandmother's house. The trip took her 6 1/4 hours.What was her average rate of speed in miles per hour.....HEEELLLLLPPP MEEEEE!!!!!!
Answers
68 miles per hour.
Simply divide the total number of miles by the time it took in a decimal format.
6 1/4 hours=6.25
425/6.25=68
can I have help, please
Answers
Help!
A volcano on a discovered planet rises to a height of 19.529 mi.
Use the table of facts to find the height of the volcano in feet.
Round your answer to the nearest tenth.
Answers
Answer:
103, 110 ft
Step-by-step explanation:
what type of shape is composed of unpredictable, irregular lines?
Answers
Answer:
Answer
a Geometry :- shapes Are composed of regular lines and curves
b Organic shapes:- Unpredictable, irregular lines that suggest the natural world. Chaotic and unrestrained.
c Texture :-The surface quality of a work of art , for example coarse/fine detailed/lacking details
right answer organic..
i hope this helps you ( ◜‿◝ )♡
Therefore, An unpredictable and irregular shape is called an organic shape.
These shapes often mimic the forms found in nature, such as the shape of a leaf or a tree branch. Organic shapes lack the symmetry and geometric precision of their counterpart, the geometric shape. In art, organic shapes are commonly used to create a sense of movement, flow, and naturalism in a composition. In design, organic shapes can add visual interest and break up the monotony of straight lines and sharp angles. To sum up, the type of shape composed of unpredictable, irregular lines is an organic shape.
Therefore, An unpredictable and irregular shape is called an organic shape.
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Cho hệ các vector
U ={(1,2,0);(0,-1,0);( (2,3,1);(1,0,2)} .
a. Tìm số chiều và một cơ sở W của không gian con sinh bởi hệ vector U .
b. Tìm tham số k để u=(2,3,k^2+1) là một tổ hợp tuyến tính của W, và suy ra [ u]W.
Answers
Answer:
SACAN MÃ QR VÀ NHẬN CÂU TRẢ LỜI
VUI LÒNG ĐƯA TÔI Ở BRAINLIEST
Step-by-step explanation:
