Answer:
C = 0.85x
Step-by-step explanation:
Total Cost = (phone + phone case) - .15(phone + phone case)
C = (x+10.99) - .15(x+10.99)
C = 1x + 10.99 - 0.15x - 10.99
combine 'like terms' to get:
C = 0.85x
Answer:
9
Step-by-step explanation:
Initial number occurs when x = 0
so its 9(2)^0
= 9*1
= 9 answer
Are you really in elementary school? This is like 8th grade or high school math....
2 quarters and 1 dime
25+25+10=60
Answer:
She should invest 6976.74 $ principal on daughter's 12th birthday.
Explanation:
We have I = prt, where I represents simple interest, p represents principal, r represents interest rate, and t represents time in years.
Here p + I = 12,000 $
So, I = 12000-p
Interest rate r = 12% =0.12
Number of years = 18 - 12 = 6 years.
Substituting
12000-p = p x 0.12 x 6
p + 0.72 p = 12000
1.72 p = 12000
p = 6976.74 $
So, she should invest 6976.74 $ principal on daughter's 12th birthday.