Multiples of 4 starting from 20

A local pizzeria sells 500 large pepperoni pizzas per week at a price of $20 each. Suppose the owner of the pizzeria tells you that the price elasticity of demand for his pizza is - 2, and he asks you for advice. He wants to know two things.

What's - x if x is - 4? is it 4 or - 4?

How does using the quadratic formula differ from completing the square?

Which of the following comparisons is false 4 liters< 1 gallon, 1 foot< 1 meter, 25 grams< 1 ounce, 10 kilometer< 9 miles

find the area, in square feet, of a triangle whose base is 4/2/3 feet and whose altitude is 8 4/7 feet

What is 1 whole - 2 --- 3

If f (x) = 2-x^1/2 and g (x) + x^2-9, what is the domain of g (x) / f (x) ?

Do you have to subtract the intersection of mutually exclusive events?

Danielle runs 1/5 of a mile in 4.5 minutes. if she continues at the same speed, how long will it take her to run two miles?

A costume designer has 40 yards of red fabric to make costumes for a musical in which 8 performers will wear red dresses and 14 people will wear red scarves. The costume maker user 3 1/2 yds for each dress and 3/4 yard for a scarf.