When x2 + 3x – 4 is subtracted from x(x2 + 3x – 2), the difference is: A. x3 + 2x2 – 5x + 4
B. x3 + 2x2 + x - 4
C. -X3 – 2x2 + 5x + 4
D. -x3 + 4x2 + x - 4

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.

Sometimes life is like a tunnel. you can’t always see the light at the end of the tunnel, but if you keep moving, you will come to a better place