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3 years ago

Answer correclty PLZZZ

Mathematics

2 answers:

ioda3 years ago

6 0

Answer: option C is the correct answer

Step-by-step explanation:

The system of linear equations is

10x + 7y = 12 - - - - - - - 1

8x + 7y = 18 - - - - - - - 2

Since the coefficient of y is the same in equation 1 and equation 2, we will eliminate y by subtracting equation 2 from equation 1, it becomes

10x - 8x + 7y - 7y = 12 - 18

2x = -6

x = - 6/2 = - 3

Substituting x = - 3 into equation 1, it becomes

10×-3 + 7y = 12

-30 + 7y = 12

Let the constants be on the right hand side and the term containing y be on the left hand side. It becomes

7y = 12 + 30

7y = 42

y = 42/7

y = 6

C) (−3, 6)

lana66690 [7]3 years ago

3 0

Answer: (-3, 6) took on 10/15/2020 and I got it correct

Step-by-step explanation:

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Step-by-step explanation:

Graph of a Real Function

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By giving x some values, we get the corresponding values of C and then we can plot the graph as a blue line, in the image provided below.

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$C'=21+10.25x$

The graph is also shown in the image, but with a red line. We can see the graph is shifted up by 3 units in the y-axis, but the slope remains the same, as the cost per book hasn't changed