What is the dimension of this matrix? 3 4 -2 9
6 2 2 5 8
7 -1
-1 3 4
7
[?] [ ]
rows columns

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. when the check comes, it says they also need to pay $3.99 in sales tax. what percentage of the subtotal is the sales tax

Solve for the equation x. 2x + 22 = 4(x + 3)