Answer:
x = 5
Step-by-step explanation:
Given
13 = - 7 + 9x - 5x , that is
13 = - 7 + 4x ( add 7 to both sides )
20 = 4x ( divide both sides by 4 )
5 = x
The answer should be A the first one
153.86m^2
Step-by-step explanation:
diameter=14
radius=14/2=7
area of circle=pi×r^2
"" =3.14×7^2
=3.14×7×7
=153.86m^2
-4 isn't a real number because there is no square root of -4. However, there is a cube root of -8, because -2 * -2 * -2 = -8.
Each book costs $34 for this problem you need to first subtract 18 from 324 which gets you 306 then divide 306 by 9 and you get 34
