Final Exam Math

Final Exam Math - 276 366 227.5 Final Exam Mat-115 487...

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276 366 227.5 487 146 Final Exam Mat-115 Name____Dana Dutch______________ Date _9/19/2010______________ Find the least common denominator for fractions with denominators 9, 12, and 16. Factor number 9: 9=3*3 Factor number 12: 12=2*2*3 Factor number 16: 16=2*2*2*2 LCM=2*2*2*2*3*3*=144 so the factors of the denominator will be 3,3 (from the 9) and 2,2,2,2 (from the 16) . .. 9*16=144 the factors from the 12 (two 2's and one 3) are included in the factors of the 9 (two 3's) and the 16 (four 2's) Subtract. so you find the LCM which is 55. So the the equation will be 40/55-11/55=29/55

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Darren used pieces of moulding feet long, feet long, and feet long to frame a doorway. If he started with 20 feet of moulding, how much was left over? 1st step is to change the mixed fraction into improper fraction. Next step is finding the GCM which is 4 now you minus that by 20 4. Add. Write the answer in lowest terms. 5. The interest rate on an equity line of credit was % last month. This month the interest rate is %. How many percentage points has the interest rate increased? Subtract: 10 3/2 – 7 7/8 Convert to 8ths: 10 12/8 – 7 7/8
Subtract: 3 + 12/8 – 7/8 = 3 5/8% 6. Find the decimal equivalent for the following fraction. = .25 7. Write the following as a common fraction or mixed number. 5.679 5.679 = 5 + .679 =5 + 679/1000 =5 and 679/1000 The mixed fraction would be 5 (679/1000) 8. Find the decimal equivalent of the mixed number. the decimal equivalent of 8 7/8 is 8.875.

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9. Write the following as a common fraction or mixed number. 0.00986 The easy way is to write a '1' under the decimal point, and then write a '0' under each digit. So you have: .00986 _______ 100000 giving 00986 / 100000 drop the leading zeros to give 986 / 100000 Then you can simplify it if you want by dividing top and bottom by 2 giving 493 / 50000 There is no number that goes into 493 and 50,000 so you're finished. 10. Divide by moving the decimal point. Move the decimal to the left by 5 places: 0.000523 11. Paula's car payment is \$342.37 per month for 3 years. How much will she pay altogether?
First observe that 3 years = 36 months (3 years and each year has 12 months) Now, every month, she pays \$342.37 We write this as: In 1 month, Paula pays \$342.37

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This note was uploaded on 09/26/2010 for the course MATH 115 math 115 taught by Professor Webb during the Spring '10 term at University of Phoenix.

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Final Exam Math - 276 366 227.5 Final Exam Mat-115 487...

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