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salantis [7]
3 years ago
6

The length of a rectangle is represented by the function L(x) = 5x. The width of that same rectangle is represented by the funct

ion W(x) = 2x2 − 4x + 13. Which of the following shows the area of the rectangle in terms of x?
(L ⋅ W)(x) = 10x3 − 4x + 13
(L ⋅ W)(x) = 10x3 − 20x2 + 65x
(L + W)(x) = 2x2 + 1x + 13
(L + W)(x) = 2x2 − 9x + 13
Mathematics
2 answers:
amm18123 years ago
7 0

Answer:

i just took the exam and its B

Step-by-step explanation:

IgorC [24]3 years ago
3 0
A= l x w
5x * 2x^2 - 4x + 13
10x^3 - 20x^2 + 65x
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5 0
3 years ago
In the right triangle the measure of C is 90
liq [111]
The measure of a right angle is 90 degrees
6 0
3 years ago
34 divided by 3 3/4 equals what in fraction form
anygoal [31]

Answer:

9.06

Step-by-step explanation:

6 0
3 years ago
In a population distribution, a score of x=57 corresponds to z=-0.25 and a score of x=87 corresponds to z=1.25. Find the mean an
Serggg [28]

Here is dependence between scores and x-values:

Z_i=\dfrac{X_i-\mu}{\sigma},

where \mu is the mean, \sigma is standard deviation and i changes from 1 to 2.

1. When i=1, Z_1=-0.25,\ X_1=57, then

-0.25=\dfrac{57-\mu}{\sigma}.

2. When i=2, Z_2=1.25,\ X_2=87, then

1.25=\dfrac{87-\mu}{\sigma}.

Now solve the system of equations:

\left\{\begin{array}{l}-0.25=\dfrac{57-\mu}{\sigma}\\ \\1.25=\dfrac{87-\mu}{\sigma}.\end{array}\right.

\left\{\begin{array}{l}-0.25\sigma=57-\mu\\ \\1.25\sigma=87-\mu.\end{array}\right.

Subtract first equation from the second:

1.25\sigma-(-0.25\sigma)=87-57,\\ \\1.5\sigma=30,\\ \\\sigma=20.

Then

1.25=\dfrac{87-\mu}{20},\\ \\87-\mu=25,\\ \\\mu=87-25=62.

Answer: the mean is 62, the standard deviation is 20.

3 0
3 years ago
Read 2 more answers
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