What is the justification for the step taken from line 2 to line 3?

3x+9-7x=X+10+X

4x+9=2x+10

6x+9 = 10

6x=1

the beach shop sold 12 skim boards on saturday and 9 on sunday. What is the percent of decrease from saturday to sunday?

The height of a stack of books, h inches is directly proportional to the number of books, n. The height of a stack of 10 books is 12 inches.

Is 1/5 less than 5/8

Ana is driving from her home in Miami to her grandmothers house in New York. On the first day she will travel 240 miles to Orlando Florida to pick up her cousin.

3. To combine the equations and solve for one of the variables, you need to eliminate the other variable. How can you change one equation so that one variable is eliminated when the two equations are added? Explain and write the new equation.

A concession stand vendor counts the money in the register. after 2 h it has $82.75. after 6 h is has $ 360.75. how much money will be in the register at the end of an 8h shift? a. 480.00 b. 489.25 c. 499.75 d. 500.00

Use the x-values: 1, 2, 3, and 4 to write solutions of the equation y = 17x + 8 as ordered pairs. (26, 1), (27, 2), (28, 3), (29, 4) (1, 26), (2, 27), (3, 28), (4, 29) (25, 1), (42, 2), (59, 3), (76, 4) (1, 25), (2, 42), (3, 59), (4, 76)

A cafeteria manager can choose from among six side dishes for the lunch menu: applesauce, broccoli, corn, dumplings, egg rolls, or French fries. He uses a computer program to randomly select three dishes for Monday's lunch.

What adds up to 1.2 and multiplies to. 32

60*4=. tens*4=. tens=.