MathNerd(version2.0)

The simplest way to solve this is to convert trillion to billion.

1.5 trillion = 1500 billion

Then multiply by .7% or .007

1500 * .007 = 10.5 billion

Assuming you meant 2x + 67 = 180

2x = 113

x = 56.5

4 (3+x) = 36

First, divide both sides by 4

3+x = 9

Then, subtract 3 from both sides

x = 6

1. How much did he canoe on average?

Do you mean each year, month, week, or day on average?

If it's week or day, you would technically need to know which month it is.

2. How much did he canoe the month he was sick?

First, find how manny miles is in each lap.

135.6 / 6 = 22.6

Next, multiply by the number of laps he did

22.6 * 5 = 113 miles.

The number is irrational so you will never really get the exact number, only an approximation. 

(1.3 billion - 1.2 billion) / (2002 - 1998)

= 1000 million / 4

= 250 million visits per year

21y + 6 = 12

21y = 6

y = 6/21

y ≈ 0.2857

x = weigh of one book

6x = 7.8

x = 1.3 pounds each

Undefined