Arectangular swimming pool is represented by x as the width and one less than twice the width as the length. if the area of the swimming pool is given by 28 sq. ft., which equation could be used to model the area of swimming pool?

a) 28 = 2x-1•x

b) 28x = 2x -1

c) 28 = (2x-1) + (x)

d) 28 = (2x - 1) (x)

Option D.

Step-by-step explanation:

Let

x ----> the width of the rectangular swimming pool in feet

y ----> the length of the rectangular swimming pool in feet

we know that

the area of the  rectangular swimming pool is equal to

we have

so

-----> equation A

---> equation B

substitute equation B in equation A

answer: a. 13/44

step-by-step explanation: judging by the information given to us, we are looking for experimental probability. we can see that 13 males have chosen chocolate ice cream. there are 44 ice creams in total (remember that the total is always the denominator). so our answer is 13/44.

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15