Solve 7x + 5y = 14 using matrices.

4x + 3y = 9

Johnny has 10 bills that add up to $320. Some bills are 50 dollar bills and the rest are 20 dollar bills. How many are 50 dollar bills and how many are 20 dollar bills?

The length of a rectangle is 2 less than 3 times the width. the perimeter is 60 inches. find the width A. 8 inches B. 22 inches C. 15.5 inches D. 20.7 inches

You want to find the average cost of the transportation you used. Train tickets: $8.50 Coach tickets: $7 Bus tickets: $5.70 Taxi fares: $9 Flight tickets: $180 The mean average is given as $42.04. Which cost distorted the data?

During a baseball game the batter hits a high pop-up directly over home plate. If the ball stays in the air sixty seconds, how high did the ball go

The population of a town is 18,000 and is decreasing at a rate of 2% per year; 6 years

If a model rocket is launched from the ground with an initial velocity of 160 ft/sec, how long will it take to reach its maximum height?

Which expression is equivalent to 9p-3p+2 A. 8p B. 14p C. 6p + 2 D. 9p-1

A car insurance company insures four types of drivers: • Good drivers who have a 3% chance of getting in an accident each year • Mediocre drivers have a 7% chance of getting in an accident in each year • Atrocious drivers who have a 20% chance of

What is 2 log x - logy - 2 log z written as a single logarithm?

What is the value of the expression when a = 4 and b = 3? 4a + b - 5 A. 2 B. 14 C. 7 D. 6