A student makes a $8.75 purchase at the bookstore with a $20 bill. The store has no bills and gives the change in quarters and fifty cent pieces. There are 30 coins in all. many quarters are there? How many fifty-cent pieces
30=q+f
.25q+.5f=(20-8.75)
solve for q, f
Find the product
could you check to see if I am right
(2x+3)(5x-4)=10x-12=x=22
(3a-4b)(3a+4b)=9a-16b
could you check these for me. thank
(2x+3)(5x-4)=
10x-12=
-2
(3a-4b)(3a+4b)=
9a-16b
Could someone check these problem for me, please
could someone check these problem please
What is the v olume of a box whose length is 12-2x, width is 7-2x and height is x?
help me
30
To find the number of quarters, we need to determine how much change the student is receiving.
Step 1: Subtract the purchase amount from the amount paid:
$20 (amount paid) - $8.75 (purchase amount) = $11.25 (change)
Step 2: Since the store gives the change in quarters and fifty-cent pieces, we need to express $11.25 in terms of quarters and fifty-cent pieces.
Step 3: Determine the number of quarters:
Since there are 4 quarters in $1, we need to find how many sets of 4 go into $11.25. We can do this by dividing $11.25 by $0.25 (the value of a quarter):
$11.25 / $0.25 = 45 quarters
Therefore, there are 45 quarters.
Step 4: Determine the number of fifty-cent pieces:
Since there are 2 fifty-cent pieces in $1, we need to find how many sets of 2 go into $11.25. We can do this by dividing $11.25 by $0.50 (the value of a fifty-cent piece):
$11.25 / $0.50 = 22.5 fifty-cent pieces
However, we cannot have a fraction of a coin, so we need to round down to the nearest whole number. Therefore, there are 22 fifty-cent pieces.
To summarize:
- There are 45 quarters.
- There are 22 fifty-cent pieces.