Landry bought 11 binders and notepads from the market and spent $45. binders cost $6 each and notepads cost $2.50 each. which two equations can be used to find the number of binders, b, and notepads, n, she purchased?
(a) b + n = 11 (b) 6b + 2.5n = 11 (c) b + n = 45 (d) 6b + 2.5n = 45

5500 dollars is placed in an account with an annual interest rate of 6.5%. to the nearest tenth of a year, how long will it take for the account value to reach 19700 dollars?

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 33 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30 ∘c on monday, but decreased at a constant rate in the next 33 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.

Find the slope of the line passing through a pair of points