Let's break this down:
The difference: Something's gotta be subtracted
Twice a number: So 2 times a number, or n
and 3: So we gotta subtract 2n and 3
is 11: The final answer is 11
So altogether is:
2n - 3 = 11
The formula for the circumference of a circle if you have diameter is:
pi multiplied by diameter
So, 3.14 multiplied by 8 is equal to 25.12
The circumference of the circle is 25.12 cm
Hope it helps :)
Answer:
- 8
Step-by-step explanation:
Given
x² - 64 = 0 ( add 64 to both sides )
x² = 64 ( take the square root of both sides )
x = ± = ± 8
Solutions are x = 8 and x = - 8