What substitution should be used to rewrite 4x^4-21x^2+20=0 as a quadratic function?

Is the sum of a negative and positive number always negative

Find the interest due on $800 at 12% for 120 days.

Can anyone solve this: The exponential function f (x) = 9204e^0.022x models the number of hits logged by a website each year where x is the years after 2000. Project the number of hits that will be logged by the website in 2020.

Simplify 0.3 + 1 3/4 a. 2 1/2 b. 1 3/7 c. 4 3/4 d. 2 1/20

Write a storyproblem that represents 2 dividedby1/8then slove

Suppose that a single card is selected from a standard 52-card deck. what is the probability that the card drawn is a club ? now suppose that a single card is drawn from a standard 52-card deck, but it is told that the card is black.

How do you write 70% as a fraction or mixed number in simplest form?

All are Algebra 1 questions. What is x? 1. 7 (x-5) - 2 = - 100 2. 2x+6 (5x-5) = 130 3.-5x+3 (-4x-11) = 137 4.2 (x+9) - 15 = - 3 5. 5-3 (x-7) = 32 6.3-3 (x-5) = 60 7.2x-2 (-3x+3) = 58 8. 5x-3 (-6x+5) = - 130

On a scale drawing, 1/4 inch = 2 miles. On the drawing, how many miles are represented by a line that is 3 1/2 inches long? A 7 miles B 12 miles C 14 miles D 28 miles

If y varies inversely as x and y = 8 when x = 9, find x when y = 12.