# Algebra

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**Math Help? Please**
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1) If N is the set of natural numbers that are factors of 18, represent this set in roster form.

2) Suppose U={1,2,3,4,5,6,7,8,9,10} is the universal set and A={1,4,5,9,10} What is A?

3) The wrestling team is holding a car wash. The teams goal is to raise at lease 252 and each car wash cost 5.25.

a) Write an inequality to represent this situation.

4) A student scored a 78 and 93 on his first two assignments respectively. He wants an average between 88 and 90.

a) Write a compound inequality representing the possible values for the a third assignment so his average is between 88 and 90.

6) John is at a car show. Beginning 2.5 miles away, a car traveling at a constant 45 miles per hour approaches and then passes John. The distance between John and the car can be represented by the equation d=/2.5-4.5t/. at what times is the car 0.5 miles from john?