What is the value of a in the equation 5 a minus 10 b equals 45, when b equals 3?

The Jacobsen family bought concessions at the state fair. • Each hot dog costs $1.25. • Each hamburger costs $2.50. • The family bought a total of 13 hot dogs and hamburgers. • The family spent $22.50 on the hot dogs and hamburgers.

Find zeros of x^4-5x^2+4

If an angle measures 50 degrees, what is it's complement?

Multiply 3.8 x 108 by 7.2 x 10-3, leave your answer in scientific notation.

Two buses leave towns 268 miles apart at the same time and travel toward each other. One bus travels 10 miles per hour slower than the other. If they meet in 2 hours, what is the rate of each bus?

Which expressions are equivalent to 10 a - 25 + 5 b

The high school, middle school, and elementary school are all on the same road. The distance from the high school to the middle school can be represented by the expression 8.7x2+11.9x+3.5.

What is LCM of two numbers if one number is a multiple of the other? give an example

8 packs of baseball cards 3 fewer packs of hockey cards than football cards 17 pack in all how many hockey cards and football cards?

Jim is at his house, and his car has 25 miles until it runs out of gas. would jim be able to make it from his house to the grocery store and back without stopping for gas? explain.