Answer:
b. 8.7
Step-by-step explanation:
Answer:
17x+4=157 and answer is x=9
Answer:
{7, -2}
Step-by-step explanation:
6x-7y=2
2x+3y= -10
multiply the second one by -3
6x-7y=2
-6x-9x=30
-16y=32
y= -2
2x - 6 = -10
2x= -4
x= -2
Answer is D.
Tempted to give you my number for help.
This is easier to understand with a picture...
We know that a triangle has 3 sides right?
Well, if the perimeter is 39 and there are 3 sides you would divide 39 by the 3 sides
39/3=13
Therefore, one side of the triangle would equal 13