If 20 man or 30 boys can do a piece of work in 36 days, in how many days will 10 men and 12 boys do it? a. 15 C: 30 b. 20 d. 40. ​

d. 40

Step-by-step explanation:

20 men = 30 boys = 36 days

1 man = 36 ÷ 20

         = 2.8

1 boy = 36 ÷ 30

        = 1.2

10 men + 12 boys = (10×2.8) + (12×1.2)

                             = 28 + 14.4

                             = 42.4

                             ≈ 40

e

step-by-step explanation:

an equation by definition has to have two or more variables (x and 2 in this case)

the domain of a function is the set of input values, x , for which a function is defined. the domain is shown in the left oval in the picture below. the function provides an output value, f(x) , for each member of the domain.