Y=3x + 8.25
...................
Answer:
9
Step-by-step explanation:
V=pi (r squared) (h/3)
75pi = 25pi (h/3)
Divide both sides by 25 pi
3= h/3
Multiply both sides by 3
h=9
Solving this kind of problem is easier if you take steps to make the coefficient of the unknown a positive one. Adding 0.6r to both sides makes the coeff. of r a positive one: 0.6r greater than or equal to 2.9+1.3.
0.6r then is equal to or greater than 4.2. Divide both sides by 0.6 to isolate r:
r greater than or equal to 7.
Let r be represented by the horizontal number line. Darken r = 7 and also darken the r axis to the right of r=7.
56 you divide them then multiple the rest
9514 1404 393
Answer:
x = 3
Step-by-step explanation:
Expand the left side and solve the resulting 2-step linear equation.
x^2 -(4 -4x +x^2) = 8
x^2 -4 +4x -x^2 = 8 . . . . . eliminate parentheses
-4 +4x = 8 . . . . . . . . . . . . . collect terms
-1 +x = 2 . . . . . . divide by 4
x = 3 . . . . . . . . . add 1