Which of these is the algebraic expression for "nine less than some number?"

9 / k

k / 9

9 - k

k - 9

Solve for p 7/p = 8/9 p=?

Find the area of the regular 30-gon with radius 10 mm. A~ mm2 (Do not round until the final answer. Then round to the nearest tenth as needed.)

What does algebra mean in math

Denny is 36 years old and his daughter is 7 years old. Denny says," My age is less than 4 more than twice the sum of my son's age and my daughter's age, in years. What are possible ages in years, a, of Denny's son?

Which shows an angle that is approximately 40°? A. B. C.

Tanya stores her coins in a cylindrical container. The container has a diameter of 8 inches and a height of 15 inches. Which is the volume of Tanya's container to the nearest cubic inch?

Scarlett selects a card at random from a deck that contains 18 red, 12 yellow, and 20 blue cards. What is the probability that she does not select a red card?

Lisa is framing a rectangular painting. The length is three more than twice the width. She uses inches of framing material. What is the length of the painting? Write an equation and solve.

How to find the radius of a sphere when you have the volume given to you

Write a two column proof. Given: 4y = 2x - 10; y = 6 Prove: x = 17