Answer:
\(2x^2 -5x - 7 =0\)
Step-by-step explanation:
We have the equation
\(x + 9 = 2(x-1)^2\)
\((x-1)^2 = x^2-2x+1\) using the formula \(\left(a-b\right)^2=a^2-2ab+b^2\)
\(x + 9 = 2(x^2-2x\cdot \:1+1^2)\) = \(2x^2-4x+2\)
Switch sides
\(2x^2-4x+2=x+9\)
Subtract 9 from both sides
\(2x^2-4x+2 - 9=x+9-9\)
\(2x^2 -4x -7 = x\)
Subtract x on both sides
\(2x^2 - 4x -7 -x = 0\)
\(2x^2 - 4x - x -7 = 0\)
\(2x^2 -5x - 7 =0\)
where
\(a = 2, b = -5, c = -7\)
Answer: I hope this helps.
Step-by-step explanation:
Determine the correct value of 3x+2 when x =5
Answer:
17
Step-by-step explanation:
3(5)+2=17
Answer:
17
Step-by-step explanation:
3x+2 substitute 5 for x
3(5) +2 distribute
15+2 solve
17
100 Points! Geometry question. Photo attached. Please show as much work as possible. Thank you!
The length KL is 8 units
The value of x is undefined
The length KL is 12 units
Calculating the length KLFrom the question, we have the following parameters that can be used in our computation:
The rhombus
Also, we have
DK = 8
A rhombus is a quadrilateral with all sides equal.
So, we have
KL = 8
Calculating the value of xHere, we have
SKAL = 2x - 8
There is no point S on the rhombus
This means that
x = undefined
Calculating the length KLHere, we have
DM = 5y + 2 and DK = 3y + 6
A rhombus is a quadrilateral with all sides equal.
So, we have
5y + 2 = 3y + 6
Evaluate
2y = 4
Divide
y = 2
So, we have
KL = 5 * 2 + 2
KL = 12
Hence, the length KL is 12 units
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What is the mode for the following set of data?
2, 5, 7, 8, 11, 11, 12
8
10
11
no mode
Answer:
11 is the answer
Step-by-step explanation:
Kody wants to test to be sure his soap dispenser design works fairly for people with different skin colors. He
selects separate random samples of 25 workers with light skin and 25 with dark skin. For each worker, he
measures the maximum distance from the dispenser at which it detects the employee's hand. Then he looks at
the difference in the sample means ( Light - TDark).
What do we know about the shape of the sampling distribution of Light - TDark, and why?
Answer: The shape cannot be determined since we don’t know the shape of either population distribution.
Step-by-step explanation:
Need answers please help
Answer
Yes, zero is contained in the interval
Which of the following expressions are equivalent to x7/4.
Armando is filling out a college application that requires he supply either his SAT math score or his ACT math score. Armando scored 610 on the SAT math and 27 on the ACT math. Which score should Armando report, given that the mean SAT math score is 515 with standard deviation of 114, and the mean ACT math score is 21.0 with a standard deviation of 5.1? Why?
Answer:
ACT score
It has a higher standardized score than his SAT
Step-by-step explanation:
Obtain the standardized score for both SAT and ACT
SAT:
Mean = 515
Standard deviation = 115
Score (x) = 610
ACT:
Mean = 21
Standard deviation = 5.1
Score (x) = 27
ZSCORE for SAT:
Zscore = (x - mean) / standard deviation
Zscore = (610 - 515) / 115
Zscore = 0.826
ZSCORE for ACT:
Zscore = (x - mean) / standard deviation
Zscore = (27 - 21) / 5.1
Zscore = 1.176
He should use his ACT score has it has a higher standard score than his SAT score. Hence, his ACT score weighs higher Than his SAT score
show your work
21 = −7n
Answer:
It would equal -3
Step-by-step explanation:
you are trying to find how to get a positive 21 so you would have to divide 21 by -7
21 ÷ -7 = -3
to make sure it's correct muiltply it
-7 × -3 = 21
So therefore n = -3
Root of the equation
Answer:
A fancy way of saying "solutions" of the equation
HELPPPPP!!!
Jack and Joey went to the store to buy candy. Jack bought 5 Hershey bars and 2 packs of
starbursts for $12. Joey bought 3 Hershey bars and 4 packs of starbursts for $13.50. Let x equal the cost of one Hershey bar and y equal the cost of one pack of starbursts.
8a) Write a system of equations that describes the situation above.
8b) using the equations from part a, determine the cost of one Hershey bat and the cost of one pack of starburst in dollars and cents
Answer:
5x + 2y = 12
3x + 4y = 13.50
One Hersey bar = 1.5
One pack of Starburst = 2.25
Step-by-step explanation:
Let :
Cost of one Hersey bar = x
Cost of one pack of Starburst = y
System of equation :
For Jack :
5x + 2y = 12 - - - (1)
For Joey :
3x + 4y = 13.50 - - - (2)
To determine the cost per Hersey bar and pack of Starburst
5x + 2y = 12 - - - (1)
3x + 4y = 13.50 - - (2)
Multiply (1) by 3 and (2) by 5
15x + 6y = 36 - - - (3)
15x + 20y = 67.50 - - - (4)
Subtract (4) from (3)
-14y = - 31.50
y = 31.50 / 14
y = 2.25
Using (1)
5x + 2y = 12
Put y = 2.25
5x + 2(2.25) = 12
5x + 4.50 = 12
5x = 12 - 4.50
5x = 7.50
x = 1.5
Simplify the expression 20+6k-14+k WILL MARK BRAINLIEST
Answer:
7k + 6
Steps:
Subtract the numbers 20+6k-14k+k
6+6k+k
Combine the terms:
6+6k+k
6+7k
Rearange terms:
6+7k
7k+6
The price of jeans was reduced $15 per week for 6 weeks by how much did the price of the jeans change over the 6 weeks
Step-by-step explanation:
1. 7 (-6)=42
after 7 weeks the price will be reduced by 7 time
the price will be reduced $42
which ratio forms a proportion with 7/14
Answer:
7 : 14, or simplified, 1 : 2
Step-by-step explanation:
Answer:
1/2
Step-by-step explanation:
divide by 7 to
what is the constant rate change shown in the graph below?
Answer:
the two points be
(0,0) and (1,-3)
slope [m]=[-3-0]/[1-0]=-3
constant rate is-3.
Vertical asymptotes and holes always occur at x values that are??
HELP PLEASE!!
Answer:
These asymptotes are very important characteristics of the function just like holes. Both holes and vertical asymptotes occur at x values that make the denominator of the function zero.
Look at this data set. 6, 8, ?, 15, 18, 14, 16, 8 The data set has 8 data points. The missing data point is a whole number. The median of the data set is 12. What is the value of the missing data point from the data set? A. 20 B. 15 C. 10 D. 5
The value of the missing data point is 10. Option C
How find the value of the missing data pointThe data set has 8 data points, and the median is given as 12. The median is the middle value when the data points are arranged in ascending or descending order.
Let's arrange the data set in ascending order:
6, 8, ?, 8, 14, 15, 16, 18
Since the median is 12, it should be the fourth data point when arranged in ascending order. Therefore, the missing data point must be the fourth value in the sorted data set.
From the given options, the only whole number that could fit as the fourth value in the data set is 10.
Thus, the value of the missing data point is C. 10.
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A closed rectangular tank has a length of 8.5 feet, a width of 3.2 feet, and a height of 4.8 feet. Find the surface area of the tank.
Answer: 166.72 \(ft^{2}\)
Step-by-step explanation: math
Step-by-step explanation:
All you have to do here is use the surface area, or SA, equation.
Sa=2lw+2lh+2hw
sa=2(8.5)(3.2)+2(8.5)(4.8)+2(4.8)(3.2)
Sa=54.4+81.6+30.72
Sa=166.72
Hope this helped!
In regard to exercise, which of the following statements about safety consideration is correct?
A.
In hot weather, exercising between 10 a.m. and 4 p.m. is best.
B.
Exercising at 100% of your maximum heart rate is best.
C.
Exercising one hour before eating is best.
D.
Remaining well-hydrated while exercising is best.
Answer:
its D just took the test
Step-by-step explanation:
Answer:
D
Step-by-step explanation:
on a piece of paper graph y<-2/5x+1 then determine which answer choice matches the graph you drew
If y would be less than or equal to -2/5x+1 , then the line will be the solid one.
What in mathematics is a linear equation?
An algebraic equation with simply a constant and a first-order (linear) term, such as y=mx+b, where m is the slope and b is the y-intercept, is known as a linear equation.
Sometimes, the aforementioned is referred to as a "linear equation of two variables," where x and y are the variables.
The given equation is y<-2/5x+1
Taking different values for x and y, we have the graph. Since y is less than.
-2/5x+1 therefore the line plotted will be dotted because it is not having equality sign. If y would be less than or equal to -2/5x+1 , then the line will be the solid one.
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Dylan hit the ball 48 out of the 60 times he was up to bat. The rest of the time, he snuck out. Approximately what percent did dylan strike out?
Answer:
20 percent
Step-by-step explanation:
(I had such a good explanation and accidentally refreshed the page)
So basics
48/60 is in
12/60 is out
Now we focus on out
we know this 12/60 becuase 48 is in and there are 60 tries so 60-48=12
So now 12/60 into a percent
A percent is basically x/100
So we gotta make 12/60 into a fraction with a denominator of 100
SO simplify fto make it easier (try to get it to 4,2,5,10,50,25 anything that goes into 100)
1/5
1/5 is 20 percent
thats a benchmark
But if you don’t know
You can always do a pro proton
1/5=x/100
Cross multiply
100=5x
x=20
annual interest rate formula
Answer:
rate = 100× I / P×T
Step-by-step explanation:
thats the formula but the answer needs to 20 characters at least so I am typing nonsense don't mind. gsuahhauanVahua
Expand the following expression −11(4−7y)
Select one:
−7y−44
33y
77y−44
−44+7y
Answer:
77y-44
Step-by-step explanation:
when you expand this type of equations you just multiply the coefficient of y and the number by -11
so:
-11*4=-44
-11*-7=77 (note: negative multiplied by negative equals positive)
so the equation now became
-44+77y
exchange places now its:
77y-44
A quadrilateral is shown.
H
6.5
5.51
What is the area of the quadrilateral? Enter the answer in the box.
The calculated area of the quadrilateral is 35.82 square units.
What is the area of the quadrilateral?Given that
BAse = 6.5
Height = 5.51
To find the area of a quadrilateral, we need to multiply the base by the height.
Area of quadrilateral = base x height
Substituting the given values, we get:
Area = 6.5 x 5.51
Area = 35.815
Rounding to the nearest hundredth, the area of the quadrilateral is 35.82 square units.
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uh hi im trash at math...help
What is the coefficient of x in the expression?6x + 9y + 15z
A) 3
B) 6
C) 9
D) 15
I WILL GIVE 20 POINTS TO THOSE WHO ANSWER THIS QUESTION RIGHT NOOOO SCAMS AND EXPLAIN WHY THAT IS THE ANSWER
Answer:
x = 11
Step-by-step explanation:
All the sides of a rhombus are equal, so you can set the equations equal to one another.
2x + 46 = 7x - 9
Subtract 2x from both sides
46 = 5x - 9
Add 9 to both sides
55 = 5x
Divide both sides by 5
x = 11
Mark my answer as the brainliest if it helped you out!
A board that is 6.5 feet long has a section cut off that is 3.8 feet long. How much of the board is left?
I am not too sure but i think it is 2.7 feet.
A square has a triangular hole in it. What is the area of the figure?
9 in. 3 in.
76.5 in 2
89 in 2
72 in 2
3 in.
9 in.
Answer:
76.5in²
Step-by-step explanation:
First we will find the area of the square. This is done by multiplying the side length (9in) by itself.
\(9 * 9 = \boxed{81}\)
The area of the square is 81in².
Next we will find the area of the triangular hole. We can use the formula \(\frac{1}{2}bh\), where b is the base of the triangle (3) and h is the height of the triangle (3).
\(\frac{1}{2}bh\\\frac{1}{2}(3)(3)\\\frac{9}{2}\\\boxed{4.5}\)
The area of the triangle is 4.5in².
Now we can find the area of the figure by subtracting the area of the square and the area of the triangular hole.
\(81 - 4.5 = \boxed{76.5}\)
The area of the figure is 76.5in².
That is the answer
- Kan Academy Advance
What is the range of the function? f(x)=3^x−1−2
The range of the equation f(x) = 3ˣ ⁻ ¹ - 2 is y > -2
Calculating the range of the equation?From the question, we have the following parameters that can be used in our computation:
f(x) = 3ˣ ⁻ ¹ - 2
The above equation is an exponential function
The rule of an exponential function is that
The domain is the set of all real numbersHowever, the range is always greater than the constant termIn this case, it is -2
So, the range is y > -2
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Q2. Evaluate: (a) \( j^{12} \); (b) \( -\frac{1}{j^{9}} \); (c) \( \frac{5}{2 j^{13}} \)
the evaluated expressions are: (a) j¹² = 1 ,(b) -1/j⁹ = j ,(c) 5/(2j¹³) = (5/2)j
to solve this use the properties of the imaginary unit.
what is imaginary unit ?
The imaginary unit is a mathematical concept denoted by i or j (in electrical engineering) that represents the square root of -1. It is called an "imaginary" unit because it does not have a real number counterpart.
In the given question,
To evaluate these expressions, we need to recall the properties of the imaginary unit, j, which is defined as the square root of -1. Specifically, we need to remember that:
j² = -1
j³ = -j
j⁴ = 1
Using these properties, we can simplify the given expressions:
(a) j¹² = (j⁴)³ = 1³ = 1
(b) -1/j⁹ = -1/(j³)³= -1/(-j)³ = -1/(-j³) = -1/(-(-j)) = -1/j = -j/j² = -j/-1 = j
(c) 5/(2j¹³) = 5/(2(j⁴)³*j) = 5/(2*1*j) = 5/(2j) = (5/2) * (1/j) = (5/2) * (-j³/j⁴) = -(5/2)j³ = (5/2)j
Therefore, the evaluated expressions are:
(a) j¹² = 1
(b) -1/j⁹ = j
(c) 5/(2j¹³) = (5/2)j
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. Evaluate the following expression to simplest form \( j^{12} \); (b) \( -\frac{1}{j^{9}} \); (c) \( \frac{5}{2 j^{13}} \)
14) Find the product of seven times five and two
thousandths.
Answer:
35.015
Step-by-step explanation:
see attached image