John can wash a car in 10 minutes. brad can wash the same car in 8 minutes. how long will it take them if they work together to wash a car?

9⁄40 minute

Step-by-step explanation:

⅛ + ⅒ → 5⁄40 + 4⁄40 = 9⁄40 [Find the Least Common Denominator (LCD), which is 40]

You add these proportions together to get a "'together' time".

I am joyous to assist you anytime.

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)

inverse operation of addition