The area of a triangle is area=1/2•base•height or a= b•h / 2
Answer:

Step-by-step explanation:
To find the slope between any two points, we can use the following slope formula:

Let (-7, -1) be (x₁, y₁) and let (3, 8) be (x₂, y₂). Substitute them into the slope formula:

Evaluate:

Therefore, the slope between the two points is 9/10.
Answer:
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Step-by-step explanation:
A+b+c = 131
b = 7 + 2a and c = a - 12
so a + 7+2a + a-12 = 131
then 4a -5 = 131
then 4a = 136
and a = 34....so b= 75 and c = 22....check 34+75+22=131√