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PERCENTAGES

CHAPTER 1 REVIEW

❶E is the variable that represents what Selena has to get on the final exam to get a 90 for the course.

maths homework help percentages

If you are given information about one of the variables, you should be able to use algebra to find the other variable.

Adding or subtracting unlike signs: Subtract the two numbers and use the sign of the larger, more precisely, the sign of the number whose absolute value is largest.

Multiplying or dividing like signs: The product or quotient of two numbers with like signs is always positive. Multiplying or dividing unlike signs: The product or quotient of two numbers with unlike signs is always negative. M ultiplication and D ivision left to right 4. A ddition and S ubtraction left to right. Simplify both sides of the equation. Write the equation as a variable term equal to a constant.

Divide both sides by the coefficient or multiply by the reciprocal. Three possible outcomes to solving an equation. One solution a conditional equation b. No solution a contradiction c. Every number is a solution an identity. An English teacher computes his grades as follows:. Sue has an 87 on the short essays and a 72 on the research paper. If she wants an 80 for the course, what grade does Sue have to get on the final?

Make sure you have done all of the homework exercises. Practice the review test on the following pages by placing yourself under realistic exam conditions. Find a quiet place and use a timer to simulate the test period. Write your answers in your homework notebook. Make copies of the exam so you may then re-take it for extra practice.

There is an additional exam available on the Beginning Algebra web page. The good thing is that they let you revise your paper for several times.

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Homework Help for Percentages. A percentage represents a fraction with as the denominator. Percentages are written using the percent sign (%). For instance, the fraction 50/ is written as 50%, and the fraction 8/ is written as 8%.