Is a fixed amount a rate of change?

X varies directly with Y and Z. x = 40 when y = 10 and Z = 20. find X when y = 30 and Z = 40.

Convert 2 5/8 into a decimal

Identify the terms coeficents and constants of 5a b2 11

Is 5 a soluation to the equation? 3x (+1) = 7 (*-2) - 3

Joni borrowed money from her aunt and agreed to pay her 5% simple annual interest. At the end of 3 years, she owes $30 in interest. how much did jodi originally borrow?

The printer charges $4 per book to print it, and you spent $3500 on advertising. you sell the book for $15 a copy. How many copies must you sell so that your income from sales is greater than your total cost?

A roller coaster can accommodate 346 rider in 20 minutes. How many riders could ride in 90 minutes?

You have $12 to buy five goldfish for your new fish tank. Write and solve an inequality that represents the prices you can pay per fish.

Adam has 16.45 kg of flour, and he uses 6.4 kg to make hot cross buns. The remaining flour is exactly enough to make 15 batches of scones. How much flour, on kg, will be in each batch of scomes?

Rebecca has 30 paintings to sell. the amount of money rebecca makes from selling x paintings is represented by a function.