Solve each system of equations algebraically

2x-y=9

3x+4y=-14

Write the number 0.000938 in scientific notion.

Circle P has a circumference of approximately 75 inches. What is the approximate length of the radius, r? Use 3.14 for π. Round t

In how many ways is it possible for the gold, silver, and bronze medals to be awarded?

A car rental agency advertised renting a luxury, full size car for $34.95 per day and $.49 per mile. If you rent this car for 5 days, how many whole miles can you drive if you only have $200 to spend

Write the number equal to 7 tens and 3 ones

At an Italian bistro, the cost of 2 plates of spaghetti and 1 salad is $27.50. The cost for 4 plates of spaghetti and 3 salads is $59.50. Write and solve a system of equations to find the cost of 1 plate of spaghetti and 1 salad.

How much would $400 invested at 9% interest compounded continuously be worth after 3 years? Round your answer to the nearest cent.

Bob needs to mix 2 cups of liquid lemonade concentrate with 3.5 cups of water to make lemonade. Bob has 6 cups of lemonade concentrate. How much lemonade can he make?

The temperature decreased overnight by 15.2°C to a temperature of - 12.8°C. Suppose t represents the temperature before it decreased. Which equation can be used to represent this situation? A. t - 15.2 = - 12.8 B. t + 12.8 = - 15.2 C. t - 12.8 = 15.

The owner of a fish market has an assistant who has determined that the weights of catfish are normally distributed, with mean of 3.2 pounds and standard deviation of 0.8 pound.