Answer:
Step-by-step explanation:
hello :
5(x + 7)² = 245
(x + 7)² = 49
x=0 is solution but you have other solution -14 because :(-14+7)² = (-7)² =49
here is an solution Step-by-step :
(x + 7)² = 49 means : (x + 7)² = 7²
(x + 7)² - 7²=0 use identity : a²-b² = (a-b)(a+b)
a=x+7 and b= 7
(x+7-7)(x+7+7) = 0
x(x+14)=0
x=0 or x+14=0
so : x=0 or x= -14
Answer:
9.4 cm^3
Step-by-step explanation:
This figure is a cylinder so the formula is V=πr^2h
r is the radius and h is the height
Here we can see the height is 3 and the radius is 1
V=π(1)^2(3)
V=π3
V=9.42 (assuming π is 3.14)
Rounded to the nearest tenth is 9.4
