Answer:
c=80 b=4
Step-by-step explanation:
c=2.5b+70 multiply the top equation by -2
c=5b+60
c=-5b+-140
c=5b+60 add both equations together
c=80
plug in 80 for c to determine b for 1 equation.
(let's pick the second equation since it is easier to deal with whole numbers)
80=5b+60 subtract 60 from both sides
20=5b divide each side by 5
4=b
hypotenuse is double the shorter length.
hypotenuse=2×7=14 in
Second option is the right choice.
x = -17
15+x = -2
x = -2 -15 (subtracting 15 both sides)
x = -17 Answer
Hope this helps!
