preston7837
09.12.2019 •
Mathematics
3x − 1/2 (8x − 2) = 4
step 1: 3x - 4x + 1 = 4
step 2: x + 1 = 4
step 3: 3x + 1 - 1 = 4 - 1
step 4: x=3
which step is incorrect?
Solved
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Ответ:
Ответ:
3 units
Step-by-step explanation:
the volume of a cone C = πr²h/3
C = 18π, h =2x, r = diameter/2 = 2x/2 =x
18π = π* x²* 2x/3
divide through by π
18 = x² * 2x/3
multiply through by 3
54 = 2x³
divide through by 2
27 = x³
x =∛27 = 3
x = 3 units = radius