Find the roots of the function.

ƒ (x) = x^2 + 81

x = - 81i, 81i

x = - 81, 81

x = - 9, 9

x = - 9i, 9i

What do you add to 3 5/7 to make 7

Pedro has a mass of 72kg. What would Pedro weigh on Mars? (The gravitational field strength on Mars is 3.7N/kg.)

Which of the following equations is equivalent to y = 2x + 1? A. 2x + y = 1 B. x + 2y = 1 C. - 2x + y = 1 D. - 2x - y = - 1

Suppose a bag contains 5 balls numbered 1 through 5. In how many way scan you select 5 balls from the bag if there is no replacement after selection?

You roll a six-sided number cube and flip a coin. What is the probability of rolling a number less than 5 and flipping tails? Write your answer as a fraction in simplest form.

A scientist estimated that a mixture would need 5 millimeters of a chemical to balance. The actual amount d was 7 millimeters. What was the percent error of the scientists estimation?

Start at 7 and subtract 3each time

Suppose you know the area of a circle and the measure of the central angle of a sector. Describe the process of finding the area of the sector.

Cups are sold 8 a package and plates are sold 12 to a package. If you want to have the same number of each item for the party, how many of each do you need to buy? what is the least number of packages of each you need to buy?

What is the formula for the sum of an infinite geometric series