If he does three hours, its 9 strips, for four, its 12, six is 18, seven is 21, and nine is 27
(n-21)/2=4n is the equation
First, divide what is in the parentheses by 2
0.5n-10.5=4n
Then, multiply the whole equation by 2 so we have all whole numbers
n-21=8n
Move N so that it is with 8n
7n=-21
Divide 21 by 7
n=-3
Solution: The number (n) is equal to -3
Answer:
The exact value of cos(45°) is √(2) / 2.
Step-by-step explanation:
Answer:
5cm
Step-by-step explanation:
volume = πr²h
225π = π × r² × 9
225/9 = r²
r = √225/9 = 15/3 = 5cm
30+70÷8÷5-1=
=30.75
hope this helps