8n-20=15+n
n=5
20 less than 8 times a number = 8(n)-20 same as (=) 15 more (+) than a number(n) 15+n
Kn + 4f = 9f
kn + 4f - 4f = 9f - 4f
kn = 5f
kn/5 = 5f/5
kn/5 = f.
f = kn/5 or
f = 1/5 (kn).
Answer:
$35 for each sweater
Step-by-step explanation:
First subtract the skirt $160 - $20 = $140
Then Divide to find cost of each sweater $140/4 = 35
Answer: 35
Answer:
±11.18
Step-by-step explanation:
the function is:
and to find the roots we need to find which values of 
makes the function result in zero:
solving for :
A square root has two solutions, one positive and one negative, so the solutions are:
±
≈ ±11.18
the roots of the quadratic equation are +11.18 and -11.18
Answer:
6x-7
Step-by-step explanation:
