Acashier at the homewood grill has $585 in $5 bills and $20 bills. the cashier has three times as many twenties as fives. how many $20 bills does the cashier have

Let us assume number of $5 bills = x.

Number of $20 is three times as many twenties as fives bills.

and number of $20 bills = 3x.

Total amount of all bills = $585.

$5 times number of x bills + $20 times number of 3x bills = $585.

5x + 20*3x = 585.

5x + 60x = 585.

Adding 5x+6x, we get 65x.

65x = 585.

Dividing both sides by 65.

65x/65 = 585/65.

x=9.

Therefore, number of $5 bills = 9.

Number of $20 is three times of number of $5 bills, that is 3*9 = 27.

Therefore, 9 are number of $5 bills and 27 are number of $20 bills.

8.75

how-to:

first, we need to find what we have to work with.

since i know that we have 7 (years) and 0.8 (inches), we can use these to solve and find the equation!

secondly, what you want to do, is see that we need to know how much growth out of the 0.8 inches he got in only 1 year, instead of 7 years.

let's try to divide.

7 ÷ 0.8 = 8.75