2) For 9 cows, 13 kg 500 g of food supplement are required every day. In the same proportion, how much will be needed for 12 cows?

18 kg

Step-by-step explanation:

We can use a proportion.

First, 13 kg 500 g = 13 kg + 500 g = 13 kg + 0.5 kg = 13.5 kg

Proportion:

9 cows is to 13.5 kg as 12 cows is to x

9/13.5 = 12/x

Cross multiply.

9x = 13.5 * 12

Divide both sides by 3.

3x = 4.5 * 12

Divide both sides by 3.

x = 1.5 * 12

x = 18

18 kg

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