Unit Test — Unit test Answers

The system of equations below has no solution.

Karina uses the system of equations below to compare the monthly utility costs in July and December for electricity, x, and natural gas, y. 750x + 17y = 141.61300x + 30y = 75.90

Kat has 19 coins, all quarters and dimes, that are worth a total of $4. The system of equations that can be used to find the number of quarters, q, and the number of dimes, d, she has is shown.q + d=190.25q + 0.1d=4

What value of b will cause the system to have an infinite number of solutions?

What is the solution (a, b) to this system of linear equations?3a+6b=452a-2b=-12