You are playing a board game. all even numbers are positive, and all odd numbers are negative. a positive
number indicates forward movement, and a negative number indicates backward movement. during your
last 10 turns, you have gone back 90 spaces. if you spun the same number each time, which number did you
spin?

9

Step-by-step explanation:

Just divide the amount moved by the number of spaces.  If you spun the same number 10 times, and went back 90 spaces, your number would be 90/10

2(2x + 3) = -4 + 2(2x + 5)

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 6

4x - 6 + 6 = 4x - 6 + 6

4x = 4x

x = x

unlimited solutions.

6(h+1)/2=a

a=area

step-by-step explanation:

its the same thing as a square or rectangle but after multiplying two sides you need to divide it by two.