What substitution should be used to rewrite 4x4 - 21x2 + 20 = 0 as a quadratic equation?

u = x2

u = 2x2

u = x4

u = 4x4

The vertex of a parabola is (-1.5, - 12.5), and its y-intercept is (0, - 8) The x-intercepts of the parabola are: (-2, 0), (-4, 0), (2, 0), (4, 0) and (-1, 0), (2, 0), (1, 0), (-2, 0)

On a multiple choice test with 13 questions, each question has four possible answers, one of which is correct. for students who guess at all answers, find the standard deviation for the number of correct answers.

Simplify 7x + (x - 4) (x + 5) - 5x. x2 + x - 20 x2 + 3x - 20 x2 - 3x - 20 x2 - x - 20

Which equation can be used to determine the distance between the origin and (-2, - 4) ? d = StartRoot ((0 minus 2) + (0 minus 4)) squared EndRoot d = StartRoot (0 minus (negative 2)) squared + (0 minus (negative 4)) squared EndRoot d =

There are 6 blades on each windmill. How many total blades are on 7 windmills? Use a five fact to solve

A Cashier at the local bank is expected to serve 12 customers every hour. In the past 15 minutes, he served 4 customers. Assuming the the cashier continues to work at the same rate, will he meet his goal? Explain

A wise man once said "300 reduced by 3 times my age is 138"

Write 4.1 - 3 using words

The eights of the students in ms. Mill's class ride the bus. if there are 24 students in the class, how many students ride the bus? Explain how to use equivalent frations to solve

When a product of intergers has an even number of negative factors then the sign of the product is what