Question

Hannah has a jar filled with 150 coins made up of quarters and nickels. The total value of the coins is $28.30

How many quarters and how many nickels are in the jar?
(Points : 1)
46 quarters; 104 nickels
75 quarters; 75 nickels
104 quarters; 46 nickels
95 quarters; 55 nickels

Answer 1

104 quarters and 46 nickels .
104*.25=26$
46*.05=2.30$
$26+$2.30=28.30

Answer 2

a quarter is 0.25 and nickel is 0.05 so just multiple and add the answer to check

Answer 3

Amy mixes 12 liters of 16% acid solution with a 40% acid solution which results in 32% acid solution.

If x represents the number of liters of 40% solution used, which equation can be used to find the number of liters of 40% acid solution in the mixture?
(Points : 1)
1.92 + 0.32x = 0.4(x + 12)
3.84 + 0.4x = 0.16(x + 12)
4.8 + 0.32x = 0.4(x + 12)
1.92 + 0.4x = 0.32(x + 12)

Answer 4

I think its d

Answer 5

d

Answer 6

thanks

Answer 7

Amy mixes 12 liters of 16% acid solution with a 40% acid solution which results in 32% acid solution.

Find the number of liters of 40% solution in the new mixture.
(Points : 1)
36 liters
24 liters
16 liters
4.8 liters

Answer 8

0.16(12) + 0.4x = 0.32(12 + x)
Solve for x

Answer 9

0.16(12) + 0.4x = 0.32(12 + x)
1.92 + 0.4x = 3.84 + 0.32x
-1.92 -1.92
0.4x = 1.92 + 0.32x
-0.32 -0.32
0.08x = 1.92
----------
0.08 0.08
x = 24 liters

Answer 10

thanks