Answer:
61.52
Step-by-step explanation:
5.66+ 13.75 + 6.76 + 4.59 + 5.66+ 6.76 + 13.75 +4.59
Given the values, you can solve for the remaining sides.
a + c will equal the side on the right and b + d will equal the side at the top.
So 2(a+c) + 2(b+d) will give the perimeter.
2(5.66+6.76) + 2(13.75+4.59) = 24.84 + 36.68 = 61.52
c)
(10x+5)-(-23-2x)=
10x+5+23+2x
=12x+28
2x+5x^2-(3x+7x^2)=
2x+5x^2-3x-7x^2
= -2x^2-1