Riley’s family is putting a rectangular pool in his backyard. the dimensions of the pool will be 12 ft. by 24 ft. by 5 ft.

the contractor building the pool needs to know how much lining he needs before starting to pour the concrete. how many square feet of liner will he need? (hint: the liner will need to cover all the inside concrete surfaces of the pool, but not the top of the pool.)

936 or 648

Step-by-step explanation:

I'm late by like 3 years but if you do the square's surface area, it would be 12*24=288*2=576

24*5=120*2=240

12*5= 60*2=120

Then add,

576+240+120=936, but again what the person said its a pool, so you wouldn't really include the top bit in a pool because a pool has no lid to the top, so you could just do 936-288=648

walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40

1 x=22.52

2: 65/39=604+39x

65x-39x=604

26x=604

x=604/26

×=23.23