I think this is the hardest question

But if you solve this you will get 500+ points

40

Step-by-step explanation:

Let the number of 20cent coins be 'x'

Then, 10cent coins are 'x + 12'

Total amount = $5.4 = 540 cents

20(x) + 10(x + 12) = 540

20x + 10x + 120 = 540

30x = 540 - 120

30x = 420

x = 420/30

x = 14 (14 20cent coins)

x + 12 = 26 (26 10cent coins)

Total coins = 14 + 26 = 40

40

Step-by-step explanation:

Let the number of 20cent coins be 'x'

Then, 10cent coins are 'x + 12'

Total amount = $5.4 = 540 cents

20(x) + 10(x + 12) = 540

20x + 10x + 120 = 540

30x = 540 - 120

30x = 420

x = 420/30

x = 14 (14 20cent coins)

x + 12 = 26 (26 10cent coins)

Total coins = 14 + 26 = 40

BRAINLIST

Step-by-step explanation:

the ratio of grapes to blueberries she should use is 12: 3

step-by-step explanation:

if mandie is making 15 cups of fruit salad, the ratio of grapes to blueberries she should use is 12: 3.