66.875 = 66 7/8 as a mixed number
Answer:
perimeter = 2(x + 5)
this is 2x + 10
x = 55 inches
Step-by-step explanation:
this question is a bit weird because they didn't put the units for 5, so I'm assuming it's in inches...
the perimeter of a rectangle will have two of each, so we can put the 2 outside the bracket since it applies to everything. We have x and we have 5 so put those in the bracket with a plus sign because you add when you're calculating the perimeter.
5 + 5 = 10
120 - 10 = 110 inches (this is 2x)
110 ÷ 2 = 55 inches
Answer:
Second one is -30, 20, -50
Third one is 30, 24, 6
Step-by-step explanation:
Equation:

3x+10 = 45+10 = 55
The answer is 55 because this is a isosceles triangle.