Before he went to the toy store, david had 13 toy cars. for the next 5 weeks he buys n number of cars each week. which algebraic expression represents how many toy cars he has at the end of five weeks?

13 + 5 × n = # of cars at the end of 5 weeks,
with n being the number of cars he buys each week

The correct expression would be 13+5n. Hope this helps (:-D)

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.

What is the last question i don’t see it?