Answer:
Let the number of five's = 2x = 2x × 5 = 10x
Then the number of ten's = x = x × 10 = 10x
10x + 10x = 640
20x = 640
x = 32
There are 32 ten dollar bills.
Answer:
5x - 4y = 20
Step-by-step explanation:
First find slope
(5- -10)/(8- -4) = 15/12 = 5/4
(y - 5) = 5/4 (x - 8), multiply everything by 4 so you don't have fractions
4y - 20 = 5x - 40
5x - 4y = 20
A bill for repairing the breaks on the Johnsons car was $125.25. If 20% of the bill was for parts and the rest for labor, how much were the Johnsons charged for labor?
Answer:
(4,3)
Step-by-step explanation:
