What is the lcm of 20 and 30

1. The average of 9 numbers in a list is 6. What is the sum of these 9 numbers? 2. Then the number 26 is added to the list. What is the average of the 10 numbers in the new list?

Use the quadratic formula to solve the equation. 4x^2+9x-10=0

A restaurant has 60 plates. One night, 9 groups of 6 people ate dinner at the restaurant at the same time. How many plates were not used by these dinners

the ratio of dogs to cat at a shelter is 42 to 26. The total number of dogs and cats at your local shelter is 272. How many dogs and cats are at the shelter?

What will the population be in 2015?

What is the area of a triangle A=77mm B=5.9mm C=9.7mm

Tell whether each number is a solution to the problem modeled by the following equations mystery number: five more than - 8 times a number is 29. what is the number?

Use number sense Duane and Mick are saving their money to build a tree house. Duane adds $5. ti their piggy bank every other week Mick adds $2. every week. So far they have saved $45. How many weeks have they been saving money?

Explain how the Venn diagrams in this lesson show that all integers and all whole numbers are rational numbers

4/5=27/x using two different methods. Explain each method