Systems of equations substitution y=5x-3 - x+7y=-21

Sue spent half of her money on a book. Then she spent $1.25 on a pen. She has $3.20 left. How much did she start with?

What is the final amount if 700 is decreased by 6% followed by a 7% increase? Give your answer rounded to 2 DP.

Write an explicit formula for the sequence 3,-9,27,-81

Which of the following is a geometric series?

90 units and 8 Units per case. How many cases and how many units needed

Divide - 3x^3-2x^2-x-2 by x-2 A. - 3x^2+4x+15 B. - 3x^2+4x+15, R32 C. - 3x^2-8x-17, R - 36 D. - 3x^2-8x-17

Jamie just bought two boxes. the first box is square, with each side measuring 10 units, and is 4 units high. the second box is rectangular and has twice the volume of the square box.

I will give brainliest! How do I find out whether the graph of this table is discrete or continuous? There is no context given for what the table represents.

6^2-3^4 divided by 3^4

What is half x 3a or 1/2 x 3a