Math Practice – Heart of Algebra
If y=px, where p is a constant, and y=32 when x=4, then what is the value of y when x=7?
If y=px, where p is a constant, and y=32 when x=4, then what is the value of y when x=7?
If m/p = 3, then what is the value of 5p/m?
h = 3m + 29.2 A doctor uses this model to estimate the height h of a boy, in inches, based on his age m, in years, between the ages of 2 and 6. According to the model, how many inches is a boy expected to grow each year?
What is the sum of (6+2i) + (−9+11i) ?
On Wednesday, Alan sent x text messages per hour for 6 hours, and Tyler sent y text messages per hour for 3 hours. Write an expression for the total number of messages sent by Alan and Tyler on Wednesday.
On Tuesday, Jax rode 13 miles on his bike in 30 minutes. What was his average speed on that ride, to the nearest tenth?
In the xy-plane, the equations 3x + 6y = 30 and x + 2y = a/3 represent the same line for some constant a. What is the value of a?
If there are 2 hydrogens and 1 oxygen in each molecule of water, how many hydrogens are there in 89 molecules of water?
A block in the shape of a right rectangular prism has dimensions 40 cm by 35 cm by 28 cm. The block has a density of 3.2 grams per cubic centimeter. What is the mass of the block in grams?
In a random sample of 350 cars of a certain model, 8 have a manufacturing defect. At this rate, how many of 5,000 cars of this model will have a defect?