1. -2x + 4x^2 - 7 - x^2 + 7 - 8x

2. 7ab - bc - 4ab - 5bc

3. 3x^2 - 5x + 7 + 2x^2 + 3x - 9

4. 3r + 2z + 9t + 4r - 5s + t

5. -5xy + 7wz - xy - 5wz

Tomas is making trail mix using granola and walnuts. he can spend a total of $12 on the ingredients. he buys 3 pounds of granola that costs $2.00 per pound. the walnuts cost $6 per pound. he uses the equation to represent the total cost, where x represents the number of pounds of granola and y represents the number of pounds of walnuts. he solves the equation for y, the number of pounds of walnuts he can buy. answer- b tomas added 6 to both sides of the equation instead of subtracting 6. just took the test

The figure shows the front side of a metal desk in the shape of a trapezoid. what is the area of this trapezoid? 10 ft²16 ft²32 ft²61 ft²

Tom drove 206 miles in 3.9 hours. estimate his average speed.