How do I work this problem 12/246

Are the lines 5x-5y=12 and x-y=-3 perpendicular or parallel

1/4 (4y+16) - 6=-1/5 (10y-35)

Erin can do 30 math problems in 45 minutes. how long will it take her to do 50 math problems?

A farmer sells 6.3 kilograms of pears and apples at the farmers market. 1/4 of this weight is pears, and the rest is apples. How many kilograms of apples did she sell at the farmers market? Express your answer in fraction and decimal form

1+4=5 2+5=12 3+6 = 21 8+11 = ?

Show how to solve the problem 378*6 using place value with regrouping. Explain how you knew when to regroup

Determine whether ⊂, ⊆, both, or neither can be placed in the blank to make the following true. {prosciutto, olives, kumquats, liver, mushrooms, quail} ___ {mushrooms, kumquats, liver, prosciutto, quail}.

Marci mailed nine letters at the post office. Each letter weighed 3.5 ounces. What was the total weight of the letters

1/3 (12 - 24v) = - 2 (4v - 2)

Casey spends $50 a week on entertainment. Kelly spends 10% less than Casey and Megan spends $5 less than Kelly. Which expression represents how much Megan spends? (w represents weeks) A) 35w B) 40w C) 45w D) 55w