An item is regularly priced at 45$ it is on sale for 40% off the regular price how much (in dollars) is discounted from the regular price

$18

Step-by-step explanation:

To find 40% of a quantity, rewrite 40% as 0.40 and multiply:

40% of $45 is 0.40($45) = $18.  This is the amount discounted frorm the regular price.

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)

no not all of them.

step-by-step explanation:

some of them have a square base.