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Lecture 1

PHY 101 Lecture 1: math review


Department
Physics
Course Code
PHY 101
Professor
Robert Fischetti
Lecture
1

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Math Review
1 Simplify the Fractions. (Express as a single fraction.)
1. 4 ×1
8
2. 3 ×2
5
3. 4
1
3
4. 9
3
4
5. 2
5+7
3(common denominator)
2 Percentage
What is the percentage of “A” out of a total “B”?
percentage= A
B×100
1. 9 eggs are taken from a total of 13 in a basket.
percentage of eggs taken from basket?
percentage of eggs left in the basket?
percentage of eggs taken from the basket compared to the eggs left?
2. percentage of 19 students out of 34?
3 Algebra
Finding an unknown value xin a relation 5 ×x= 9
Always do the same thing (×,÷,+,) to both sides
5×x
5=9
5then clean up
x=9
5
1. 7
y= 3
2. 3 + 1
d= 2
3. t= 3
4. 4 = 1
x2
1
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