A bag of fertilizers covers 30 square yard of lawn. find how many bags of fertilizers should be purchased to cover a rectangular lawn 25 yards by 18 yard

15 bags

Step-by-step explanation:

25 * 18 yard^2 = area

so, Area/Fertilizercoverrate = what we want.

25*18/30 = 15 bags

answer: it's a

step-by-step explanation:

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional