5x+2y=21-x-y=-9 what is the answer

Which expression is equivalent to (-2) (a+6)

Jenny puts mailing stickers on packages. Each package needs 5 stickers. How many stickers will Jenny use if she is mailing 105 packages

a DVD storage tower has eight shelves. Each shelf can display 12 DVDs. How many storage towers does a worker need to display 1440 DVDs?

Identify the missing angle measurement in each set of supplementary angle

kerion has a beaded necklace business she can make 12 necklace in 2 hours how long will it take her to make 9 necklace

Evaluate the expression for x = 4 1/3 9x + 4 A) 39 B) 40 C) 43 D) 52

Tom rented a truck for one day. There was a base fee of $16.99, and there was an additional charge of 90 cents for each mile driven. Tom had to pay $190.69 when he returned the truck. For how many miles did he drive the truck?

What are the advantages of using an algebraic expression to represent a pattern rule, compared with describing the pattern in words?

What is they ratio of students in 6th grade if there are 20 6th graders and 24 students in 5th grade

Travis runs an average of 25 miles per week give or take six miles. let m be the number of miles travis runs each week