Which quadrilaterals have two pairs of parallel sides?
choose all answers that are correct.
rhombus
square
trapezoid
parallelogram
pls

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

The weight of full–grown tomatoes at a farm is modeled by a normal distribution with a standard deviation of 18.4 grams. the 95 percent confidence interval for the mean weight of the tomatoes is calculated using a sample of 100 tomatoes. what is the margin of error (half the width of the confidence interval)?

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)