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Questions in Grade Middle-school

[Homework Help] Write a number decreased by 7 is at most 13.

[Homework Help] To pay for a sofa, Maddie made a payment of $64 each month for one year. How much did the sofa cost?

[Homework Help] PLZ HELP ME!!!!!!!!!! Which shows the prime factorization of 84? A. 2 • 2 • 2 • 3 B. 2 • 2 • 3 • 7 C. 2 • 3 • 3 • 7 D. 2 • 2 • 3 • 3

[Homework Help] Is [tex]y = \frac{3}{4}x[/tex] a direct variation? If so, find the constant of variation.

[Homework Help] What is the type of sedimentary rock that forms when sediments stick together?

[Homework Help] How would I separate each mixture in a fish tank?

[Homework Help] The standard molar heat of vaporization for water is 40.79 kJ/mol. How much energy would be required to vaporize 30.0 g of water? Answer in units of kJ.

[Homework Help] Anne, Ryan, and Joel collect empty cans for recycling. They collect a total of 1,925 cans. - Anne collects half as many cans as Ryan. - Joel collects twice as many cans as Ryan. How many cans does Joel collect?

[Homework Help] A roll of ribbon was 9 meters long. Kevin cut 8 pieces of ribbon, each of length 0.8 meters, to tie some presents. He then cut the remaining ribbon into pieces, each 0.4 meters in length. a) How many pieces of ribbon, each 0.4 meters in length, did Kevin have? b) What was the length of ribbon left over?

[Homework Help] Winston is 8 years older than Xavier. In 2 years, Winston will be twice as old as Xavier. How old is each one now?