XHelp I need help on this math question I think its easy for others.

11. D Square pyramid

12. A Cube

1) D

2) A

Step-by-step explanation:

I hope this helps.

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

12

step-by-step explanation:

12 + 5 = 17

12x2=24

24-7=17