The average number is 21. If three of the numbers are 12 18 and 28. What is the missing number

Experts agree the planet can produce enough food for 11 billion people. The EARTH today has 7.6 billion people. 7.6 is what % of 11?

A local grocery store tested spinach samples for E coli bacteria using two different tests. The first test has a 94% probability of giving accurate results, while the second test is accurate 89% of the time.

Use any model you choose to find the quotient. 1/5 divided by 3

What percent of 63.8 is 37.8?

What is y=3-2x-x^2 in standard form

Jimmy found five numbered cards, 1, 2, 3, 4, and 5 under his brother's bed. In how many ways can he arrange the cards to form a five-digit number?

Is 9x to the power of 2 and 5x like terms?

Which of the following are independent pairs of events? Check all that apply. A. Flipping two coins and having one show a head and the other show a head B. Being sneezed on and catching a cold C.

What is the equation of the line that is perpendicular to and has the same y intercept as the given line?

5x + 20 = y 5x + 20 = 70 5x = 50 x = 10 Jack has a business mowing lawns and charges a flat fee of $20 per yard, plus an additional $5 an hour. He wants to make sure that he makes at least $70 doing yard work for a client with a very large yard.