The perimeter is 2b+2h.
2(x+4)+2(x-6)=88
2x+8+2x-12=88
4x-4=88
4x=90
x=22.5
Any questions?
5. D (the number under the square root symbol must be greater than or equal to 0.
Since there is a 5 to the right of the decimal, you will round the number immediately to the left of the decimal up. So the nearest whole number would be 71.
1/5(2x - 10) + 4x = -3(1/5x + 4)
0.4x - 2 + 4x = -0.6x - 12
4.4x - 2 = -0.6x - 12
5x - 2 = -12
5x = -10
x = -2
