Distributive property means that you have to multiply everything directly outside the parent hes to everything inside the parentheses. For this problem multiply 7 to the 9x and to the -9 like so:
7(9x) + 7(-9)
63x + (-63)
63x - 63
Look at image below if you are still confused
Hope this helped!
A)line a and line b is your answer.
Answer:
1
Step-by-step explanation:
To find the slope, you must subtract the second y axis from the first y axis then the second x axis from the first x axis.
Problem: (5, 3) (-2, -4)
Solution: Step 1. - 4 - 3 = 7 (subtract the second y axis from the first y axis)
Step 2. - 2 - 5 = 7 (subtract the second x axis from the first x axis)
Answer: 7/7
Final Answer: 1
Mark me as brainliest!!

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So, we have the following equation...

Remember
and
is the following...

Therefore, 
So, your final answer is
.
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<em>Glad to help!</em>

Answer:
By multiplying
If the sides were 5 then you would do 5x5 to get the area
Hope this makes sense :)