Which is the best estimate of A.2 B.6 C.12 D.24

24

Step-by-step explanation:

90/7 ÷ 1 3/4

Change to an improper fraction

90/7 ÷ ( 4*1 +3 ) /4

90/7 ÷ 7/4

Copy dot flip

90/7 * 7/4

90/4

22.5

Best estimate is 24

distance covered by pamela in 9 l of fuel = 99km

let us apply unitary method here.

distance covered by pamela in 1 l of fuel =99/9 =11 km

now let us find distance covered by pamela if she has 12 l of fuel.

distance covered in 12 l = distance covered in 1 l of fuel * 12

we know that distance covered by here in 1 l is 11 km.

so distance covered in 12 l of fuel = 11*12 = 132 km.

47 - 90 = 43

43 - 180 = x

x = 137