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3 years ago

PLEASE HELP!! WILL GIVE BRAINIEST!!! Please solve #7 and #8.

Mathematics

2 answers:

lawyer [7]3 years ago

8 0

7)
slope = (1+3)/(-1+10) = 4/9

y = mx + b
1 = 4/9(-1) + b
b = 1 + 4/9
b = 13/9
equation
y = 4/9x + 13/9

answer is D.y = 4/9x + 13/9

8)
y = 3x - 3
perpendicular so slope = -1/3

passing thru (-7, 9)
equation
y - 9 = -1/3(x +7)

answer is D. y - 9 = -1/3(x +7)

sukhopar [10]3 years ago

3 0

The answer to 7 is:y = (4/9)x + (13/9).
The answer to 8 is B, I think.

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anyanavicka [17]

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To determine if an ordered pair is a solution, we substitute the x and y-values into the inequality and check if it is true.

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$\begin{gathered} For\text{ the point }(8,5) \\ x=8,y=5 \\ 4x-6y\leq-18 \\ 4(8)-6(5)=32-30=2 \\ Since\text{ }2>-18,\text{ then }(8,5)\text{ is not a solution} \end{gathered}$

Therefore, the correct answers are selected as shown below;

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