What is the value of the expression 2x^2 + 3xy -4y^2 when x = 2 and y = -4

Lydia collected two sets of data one set of data shows an outlier. which set has an outlier, and which number is the outlier?

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?

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?