30. what is the selling price of an article that lists at $1,500 subject to discounts of 40%, 25%, and 10%? (you may use the method described in “check your selling price.”) 31. what is the discount on $640 if the discount rates are 25%, 10%, and 5%?

1500-40%= 900

1500-25%= 1125

1500-10%=1350

640-25%= 480

640-10%=576

$640-5%=608

Step-by-step explanation:

In order to calculate this you just need to mutliply the cost of the products by the amount that is not in disscount, for example the 1500 product has a disscount of 25% that means that the final cost will be 75% so 1500+.75=1125 and taht would be the cost.

The same with all of the other prices,  you taje the original price and multiply it by the decimal final percentage price, and you get the final price.

b. x- 48 =120

step-by-step explanation:

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb