Algebra Answers

At the end of her shift a cashier has a total of $ 6.30 in dimes and quarters. There are 7 more dimes than quarters. How many of each of these coins does she have ?

A pharmacist needs to make 20 cc of a 0.05% steroid solution to treat allergic rhinitis. How much of a 0.08% solution and a 0.03% solution should be used?

If the exchange rate between the American dollar and the Japanese yen is such that $4.00 = 442 yen how many yen could be exchanged for $ 70.00?

If the exchange rate between the American dollar and the Japanese yen is such that $4.00 = 442 yen how many yen could be exchanged for $ 70.00?

The ratio of salt to baking soda in a cookie recipe is 0.75 to 1. If a recipe calls for 1 1/2 teaspoons of salt , how much baking soda is in the cookie dough.?

Laws of indices

30% silver is mixed with 200g of a 10% silver alloy. How much of the 30% alloy must be used to obtain an alloy that is 24% silver?

A model rocket is launched upward with an initial velocity of 290 feet per second. The height, in feet, of the rocket t seconds after the launch is given by
h = −16t2 + 290t.
How many seconds after the launch will the rocket be 380 feet above the ground? Round to the nearest tenth of a second. (Enter your answers as a comma-separated list.)

Running at an average rate of 4 meters per second, a sprinter ran to the end of a track. The sprinter then jogged back to the starting point at an average rate of 2 meters per second. The total time for the sprint and the jog back was 2 minutes 6 seconds. Find the length of the track.

Solve the formula for the specified variable.

A= 1/2h(b1 + b2); b