Topic 7 Review DL Directions: Show your work for each problem.

Use the Distributive Property to expand the expression. 6(5x-8)

Find a sum equivalent to the product shown. 5(x+z)

Which of the expressions have like terms? Circle them.

-25m+7m+m
5y+5x+25
6.75t+7.75t-t
11m +mn
7xy-9xy
6-9p

Your friend incorrectly factors the expression 35x-14xy as 7x(5-2xy)

Factor the expression correctly.

What error did your friend likely make?

Complete the factored form of the linear expression.
9x+6y=( )( + )

Rewrite the expression without parentheses. 12m-(2+3m)

Find the sum (6x+4)+(-7x+3)

Write an equivalent expression without parentheses. Then simplify the result. 9m-(8+4m)

On a math test a student, Jake, has to identify all the coefficients and constants of the expresion 2+5y+b. Jake says that 5 is a coefficient and 2 is a constant.

Identify all the coefficients and constants of the expression.

What error might Jake have made?

Pls do this having trouble

hello!

to begin with, we're given that on earth, a rock weighs 20 pounds, and while on jupiter, that same rock weighs 42 pounds. now, we're trying to find the weight of a rock that weighs 10.5 pounds on earth, on jupiter.

to solve this, first, set up a proportion, cross-multiply, and solve it algebraically.

setting up the proportion is the hardest and the most confusing part of the problem, but it's simple.

if on earth, the rock weighs 20 lbs, and on jupiter it weighs 42 lbs, our first part of our proportion is 20/42 lbs. the second part has to be equal to each other. this means that 10.5 has to be on the numerator of the fraction, and x, the value we're trying to find, has to be on the denominator. remember that the rock weighs 10.5 lbs on earth, and we're trying to find the weight of it on jupiter (which is x).

20/42 = 10.5/x

next, you would cross-multiply.

20x = 42(10.5)

20x = 441

now, solve it algebraically by using division.

x = 22.05 lbs

this can be rounded to 22.1 lbs.

therefore, the weight of the rock on jupiter is 22.1 lbs, the fourth choice.