Why is the first step when solving
2x – 15 - 4x = 3 to combine like terms?

The graph below shows the amount of money left in the school’s desk fund, f, after d desks have been purchased. for each new desk that is purchased, by how much does the amount of money left in the school’s desk fund decrease?

Which ordered pair is a solution to the system of linear equations? 2x + 3y= 6 –3x + 5y = 10

For each polynomial, determine the degree and write the polynomial in descending order. a. –4x^2 – 12 + 11x^4 b. 2x^5 + 14 – 3x^4 + 7x + 3x^3