The first equation: t=b-4 The second equation: b+t=348

Since is in terms of b from the first equation, this expression can be substituted into the second equation where appears. Write an equation that shows this substitution.

Type the equation:

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.

The correct answer is: b