2. Which of the following is the standard form of a linear equation in two variables? A. y = mx + b
B. y = mx - b
C. Ax + By = C
D. Ax – By = C

The? half-life of a radioactive substance is 20 years. if you start with some amount of this? substance, what fraction will remain in 120 ? years

Starting at home, emily traveled uphill to the hardware store for 606060 minutes at just 666 mph. she then traveled back home along the same path downhill at a speed of 121212 mph. what is her average speed for the entire trip from home to the hardware store and back?

What value is a discontinuity of x squared plus 8 x plus 4, all over x squared minus x minus 6?