Answer:
The number of quarter coins is 9, the number of dime coins is 5 and the number of nickel coins is 18
Step-by-step explanation:
Let
x ----> the number of quarter coins
y ---> the number of dime coins
z ---> the number of nickel coins
Remember that



we know that
----> equation A

----> equation B
----> equation C
Solve the system by substitution
substitute equation B and equation C in equation A

solve for x



<em>Find the value of y</em>

substitute the value of x

Find the value of z


therefore
The number of quarter coins is 9, the number of dime coins is 5 and the number of nickel coins is 18
Answer: C, Bottom Left
Step-by-step explanation:
Answer: $1,560
Step-by-step explanation:
Assume the computer's price is x.
This means that expressing the printer in terms of x would be:
= 30% * x
= 0.3x
These two put together represent the cost of $2,028
Expression is:
x + 0.3x = 2,028
1.3x = 2,028
x = 2,028/ 1.3
x = $1,560
Computer was $1,560
Printer was therefore:
= 1,560 * 30%
= $468
Subtract $3 from $21 to get the cost of skating for three hours without the rental fee. 21-3=18. $18 was spent on skating for three hours so you'll divide 18 by 3 to get the hourly rate. 18/3=6.
C(x)=6x+3