H + m = 480
h = 2m
2m + m = 480
3m = 480
m = 480/3
m = 160 <=== there were 160 math books
h = 2m
h = 2(160)
h = 320 <=== there were 320 history books
Answer:
12.5
Step-by-step explanation:
.25 x 50= 12.5
Step-by-step explanation:
(-1)⁴ - 11 = 1 - 11 = -10
0⁴ -11 = -11
1⁴ - 11 = -10
2⁴ -11 = -3
90 divided by 5 is 18 so $18 is the answer
Answer:
go get smart and stop cheating on online websites
Step-by-step explanation:
