Which equation is an example of the use of the associative property of addition?

1) x+7=7+x

2) 3 (x+y) = 3x+3y

3) (x+y) + 3 = x + (y+3)

4) 3 + (x+y) = (x+y) + 3

S before he gave away the 10 marbles then his friend Mark had nine marbles then his friend gave him 9 more then his other friend gave him 18 War now how many marbles does Mark have gave him 20 marbles now how many marbles does he have

What is the length of KM?

The sum of two numbers is 66. the larger number is 8 more than the smaller number. what are the numbers?

A random sample of 85 group leaders, supervisors, and similar personnel at General Motors revealed that, on average, they spent 6.5 years in a particular job before being promoted. The standard deviation of the sample was 1.7 years.

Is the inequality true or false -7 less than or equal too - 6

A company rents vans for a rental fee of $18.00 per day with an additional charge of $0.45 per miles that a can is driven. Write an equation the represents the cost (c) of renting a van for one day and driving (m) miles.

How do you factor out the trinomial: 6x²+14x+4

What will be the shape of the model for 10000

Expand the expression In (2x^3/5y)

Dr. Casey has a cylindrical beaker he fills with about 113 cubic inches of hydrochloric acid. The hydrochloric avid has a height of 4 inches in the beaker. To the nearest inch, what is the diameter of the hydrochloric acid in Casey's container?