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 Dependent Variable

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# MATH 095 Chapter 1 Review Solutions

1. List all the factors of 48. Factors of 48 are : 1 , 2 , 3 , 4 , 6 , 8 , 12 , 16 , 24 , 48

2. Find the prime factorization of 240.  3. Write the prime factorization for 12 and 75. Then find the LCM of 12 and 75. 4. Write the prime factorization for 15, 36, and 54. Then find the LCM for 15, 36 and
54. 5. Write an equivalent expression with the given denominator. 6. Write an equivalent expression with the given denominator. Problems 7 – 9: Simplify  Problems 10 – 13: Evaluate

10. for a =6 and b =4 11. for x =30 and y =9 12. −7x2 for 13. 3x2  for   16. The opposite of − 3 is 3.

17. The opposite of is 18. The reciprocal of − 3 is .

19. The reciprocal of is When When 20. Find when and 21. Find when and When When Problems 22 – 27: Write as an algebraic expression.

 22. 10 more than y 23. 8 less than z 24. 7 more than 3 times x 25. 7% of some number 0.07x 26. the sum of y and z 27. the product of 4 and c Problems 28 – 31: Insert < or > to write a true statement.

28. − 2 > − 5

29. −3.1 < −3.04  32. Locate the following numbers on a number line:  Problems 33 – 50: Compute and simplify.

33. 6+ ( −9 )+ ( −8 )+ 7 = 13 + (−17) = − 4  Problems 51 – 52: Multiply Problems 53 – 55: Factor Problems 56 – 61: Simplify 62. The temperature in Antarctica dropped from −59° F to −73° F . How many degrees did the
temperature drop? Temp dropped14° F.

63. The simple interest I on a principal of P dollars at interest rate r for time t, in years, is given
by I=Pr t. Find the simple interest on a principal of \$5,400 at 4% interest for 5 years The interest is \$1,080

64. On the first, second, and third downs, a football team had these gains and losses: 5-yd gain,
12-yd loss, and 15-yd gain, respectively. Find the total gain (or loss).

5 + (−12) + 15 = 8 The total gain is 8 yards.

65. The temperature of a chemical compound was 5°C at 4:15 p.m. During a reaction, it dropped
3°C per minute until 4:27 p.m. What was the temperature at 4:27 p.m.?

T temp at 4 : 27 p.m. The temp at 4 : 27 p.m. was 31 C.

66. Last year a certain make of car cost \$17,500. This year the same car cost \$18,200. What was
the percent increase in the price? The price of the car increased by 4%.