# 111 Which one of these equations is linear?

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Chapter A / Exercise 9
General Chemistry
Ebbing/Gammon
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MATH 112 Final Exam Study Questions Spring 2016 1. (1.1.1) Which one of these equations is linear? (A) 3? + 2 = 4√? (B) √4 ? − 3 = ? (C) 3? + ? = 2 (D) ? − ? = 7 (E) ? 1/3 = 7 5 1 2 2. (1.1.2) Solve for ? : + 1 = 2?
?−3 ?−3
3. (1.2.2) Tina has \$6.30 in nickels and quarters in her coin purse. She has a total of 54 coins. How many of quarters does she have?
4. (1.2.3) A company produces a pair of skates for \$43.53 and sells each pair for \$89.95. the fixed costs are \$742.72, how many pairs must the company produce and sell in order to break even? If
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##### We have textbook solutions for you!
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Chapter A / Exercise 9
General Chemistry
Ebbing/Gammon
Expert Verified
5. (1.2.4) A premium mix of nuts costs \$12.99 per pound, while almonds cost \$6.99 per pound. A shop owner adds almonds into the premium mix to get 90 pounds of nuts that costs \$10.99 per pound. How many pounds of almonds did she add? (A) Between 15 and 25 pounds (B) Between 25 and 35 pounds (C) Between 35 and 45 pounds (D) Between 45 and 55 pounds (E) More than 55 pounds
6. (1.2.5) A chemist wants to strengthen her 40L stock of 10% solution of acid to 20%. How much 24% solution does she have to add to the 40L of 10% solution in order to obtain a mixture that is 20% acid?
7. (1.2.6) A boat travels down a river with a current. Travelling with the current, a trip of 66 miles takes 3 hours while the return trip travelling against the current takes 4 hours. How fast is the current?
8. (1.2.7) Two motorcycles travel toward each other from Chicago and Indianapolis (about 350km apart). One is travelling 110 km/hr, the other 90 km/hr. If they started at the same time, after how many hours will they meet?
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9. (1.2.8) Suppose it takes Mike 3 hours to grade one set of homework and it takes Jenny 2 hours to grade one set of homework. If they grade together, how long will it take to complete one set of homework? (A) 2.5 hours (B) 2 hours (C) 1.8 hours (D) 1.5 hours (E) 1.2 hours
10. (1.2.9) Suppose a journeyman and apprentice carpenter are working on making cabinets. The journeyman is twice as fast as his apprentice. If they complete one cabinet in 14 hours, how many hours does it take for the journeyman working alone to make one cabinet?
11. (1.4.4) Solve 3? 2 − 2? = 8 . The SUM of the solutions is:
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