Answer:
Step-by-step explanation:
You need to set up a proportion.
(21 - 15) / 21 = 4/(x + 4)
6 / 21 = 4/(x + 4)
2/7 = 4/(x + 4)
2(x + 4) = 7*4
2x + 8 = 28
2x + 8-8= 28 - 8
2x = 20
x = 20/2
x = 10
First convert 7.5% into a decimal (.075)
1,150 * .075 = 86.25
1,150 + 86.25 = 1,236.25
Answer:215
Step-by-step explanation: If she has read 25 on Monday, 25 on Tuesday, and 55 on Wednesday, then she had read 105 in total. To find how many she has left, we subtract.
320-205=215