Answer:
n=90
Step-by-step explanation:
80% as a decimal is 0.80
0.80n = 72
n = 72/0.80
n = 90
Not my work
Answer:
A) The width is 12 cm; the average time is 3 minutes
Step-by-step explanation:

Cross multiply.
5 × y = 3 × 20
5y = 60
5y ÷ 5 = 60 ÷ 5
y = 12
The width is 12 cm. Moving onto the time.

Cross multiply.
4 × y = 12 × 1
4y = 12
4y ÷ 4 = 12 ÷ 4
y = 3
The time is 3 minutes.
Answer:
square root of 29 or approximately 5.38
Answer:
41.8 degrees for both angles
Step-by-step explanation:
Because the angle is bisected, it creates two equal, lesser angles. This means that the larger angle must be divided by two.