Solve the following system by the substitution method. check the solution(s). 0.1x+0.2y=-0.6 and 0.6x-0.3y=2.3

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items

Mr. walker is looking at the fundraiser totals for the last five years , how does the mean of the totals compare to the median?