The model shows the expression 21 + 9. Which expression is equivalent to this sum?
O 3(7+3)
O 3(7) + 3
3+7+3
07(3+3)

Write the expression 7x^3-28xy^2 as the product of 3 factors

Acaterpillar eats 1400\%1400% of its birth mass in one day. the caterpillar's birth mass is mm grams. which of the following expressions could represent the amount, in grams, the caterpillar eats in one day? \

Use the linear combination method to solve the system of equations. explain each step of your solution. if steps are not explained, you will not receive credit for that step. 2 + 9 = −26 −3 − 7 = 13