How many faces have an area of 70 cm2?

3

Step-by-step explanation:

The base of it: 5*14 = 70

The left side: 14*5 = 70

The right side: 14*5 = 70

The two triangle sides are 7*12 = 84 cm^2

7. d. 64

8. i. 32

9. c. 125

10. j. none of the above

11. d. 81

12. i. 216

13. e. none of the above

14. g. 240

15. e. none of the above

16. g. 32

17.   e. none of the above

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!