you'd have to multiply them each. then add them all together when your done. like this, 5x5x3=75
Answer:
They all make a shape and the perimeters are the same but being doubled each time. They can make parallelograms. As a triangle is added they have at least one parallel side.
Step-by-step explanation:
-4 =x
2x - 5= 5x + 7
Subtract 2x from each side
2x-2x - 5= 5x-2x + 7
-5 = 3x+7
Subtract 7 from each side
-5-7 = 3x+7-7
-12 = 3x
Divide by 3
-12/3 = 3x/3
B
Angles in a triangle add up to 180
Take 45 + 90 then subtract the answer from 180
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