A bag has 7 red marbles, 8 blue marbles and 3 black marbles. What is the probability of picking a black marble, replacing it, and then picking a red marble?

Joey has a collection of model cars. His favorite are the red ones, which make up 30% of his collection. If there are 27 red ones, how many model cars does Joey have?

What is 36/93 as a decimal

Let x represent the number of hours you read a book and y represent the total number of pages you have read. You have already read 70 pages and can read 30 pages per hour. Write an equation relating x hours and y pages you read.

Ms. DeMarco wants to estimate the length ofher porch so she knows how much paint to buy. What is the best benchmark for her to use? A her fingertip B a license plate C a baseball bat D how far she could walk in 20 minutes

This year my age is a multiple of 4, Next year my age is a multiple of 5. I'm older than 18 and younger than 42. How old am I?

1. At the end of the year the capital of a business was $33000, at the beginning of the year the capital was $28000. During the year the owner withdrew from personal use $2000. What was his net profit for this year? 2.

Find the necessary sample size. Scores on a certain test are normally distributed with a variance of 68. A researcher wishes to estimate the mean score achieved by all adults on the test.

At the super market you can fill your own honey bear container. a customer buys 12 oz of honey for $5.40. how much honey can you buy per dollar

The sum of two numbers is 66. The smaller number is 12 less than the larger number. What are the numbers

What is 16/9 as a mixed number