DIRECTIONS: Evaluate each expression if x = 12, y = 20 and 2 = 4. Show order of operations steps used for credit. Do not just write the final answer.
x + y - z
(y-x) + (y - 3)
3x + 2y

Which expressions are equivalent to -7+3(-4e-3)? choose all answers that apply: choose all answers that apply: a -4(3e+4)? 4(3e+4) b 12e12e c none of the above

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.

What makes a trapezoid an isosceles trapezoid?