Banners at the school store were on sale for $3 off the rugular price. louis brought 4 banners on sale and paid a total of $18. write and solve an equation to find the regular price of one banner

$7.50

Step-by-step explanation:

4 x 3.00 = $12.00  3.00 off the regular price makes it 12.00 for all the banners

12.00 + 18.00 = 30.00   you add the sale price with the 12.00 to get the total of each banner before the store gave the sale price.

30.00 divide by 4 = 7.50   to find out what the regular price of the banner you divide by the total of banners you bought to get the price of each banner before the sale.  

7! = 7×6×5×4×3×2

3! = 3× 2

as 7! is multiple of 3! because 7! contains 3! that is 3× 2 as factor

so 7! /(3! ) = 7× 6× 5× 4

= 42 × 20

= 840

its b) 840✌✌✌

dhruv⭐

$5.41

step-by-step explanation:

$20 - $14.51 = $5.49.