The sum of a number and 9 is - 7

x = the number

x + 9 = the sum of a number and 9

8(x + 9) = eight times the sum of a number and 9

8(x + 9) = 7

8x + 72 = 7

x = (7 - 72) / 8 = -65 / 8

Step-by-step explanation:

the probability that a bird is green (.30) is true

step-by-step explanation:

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.