week 2 quiz Solve the system of equations by elimination, calculus homework help

QUESTION 1

  1. Solve the system of equations by elimination.


4 points

QUESTION 2

  1. Solve the system of equations by substitution.


4 points

QUESTION 3

  1. Solve the problem.

    The Paperback Trader is a book store that takes in used paperbacks for 20% of their cover price and sells them for 50% of their cover price. Pat brings in a stack of 16 paperback books to trade and gets $17.50 credit. Some of the books had a cover price of $7.97, the rest $3.97. She wants to get some Tom Clancy books having a cover price of $7.97. How many $7.97 books did she bring in and how many Clancy books can she get without paying any additional cash?

4 points

QUESTION 4

  1. Solve the system of equations. If the system has no solution, say that it is inconsistent.


4 points

QUESTION 5

  1. Solve the system of equations. If the system has no solution, say that it is inconsistent.


4 points

QUESTION 6

  1. Solve the system of equations by substitution.


4 points

QUESTION 7

  1. Solve the system of equations by substitution.


4 points

QUESTION 8

  1. Solve the system of equations by elimination.


4 points

QUESTION 9

  1. Solve the system of equations. If the system has no solution, say that it is inconsistent.


4 points

QUESTION 10

  1. Solve the system of equations by elimination.

4 points

QUESTION 11

  1. Solve the system of equations. If the system has no solution, say that it is inconsistent.


4 points

QUESTION 12

  1. Solve the problem.

    A tour group split into two groups when waiting in line for food at a fast food counter. The first group bought 7 slices of pizza and 4 soft drinks for $31.49. The second group bought 5 slices of pizza and 6 soft drinks for $26.61. How much does one slice of pizza cost?

4 points

QUESTION 13

  1. Solve the system of equations by elimination.


4 points

QUESTION 14

  1. Solve the system of equations by substitution.


4 points

QUESTION 15

  1. Solve the system of equations. If the system has no solution, say that it is inconsistent.


4 points

QUESTION 16

  1. Solve the system of equations by elimination.


4 points

QUESTION 17

  1. Solve the problem.

    An 8-cylinder Crown Victoria gives 18 miles per gallon in city driving and 21 miles per gallon in highway driving. A 300-mile trip required 15.5 gallons of gasoline. How many whole miles were driven in the city?

4 points

QUESTION 18

  1. Solve the system of equations by substitution.


4 points

QUESTION 19

  1. Solve the system of equations by substitution.


4 points

QUESTION 20

  1. Solve the problem.

    A movie theater charges $8.00 for adults and $5.00 for children. If there were 40 people altogether and the theater collected $272.00 at the end of the day, how many of them were adults?

4 points

QUESTION 21

  1. Verify that the values of the variables listed are solutions of the system of equations.


    x = 4, y = 3

4 points

QUESTION 22

  1. Verify that the values of the variables listed are solutions of the system of equations.


    x = -1, y = 6

4 points

QUESTION 23

  1. Solve the system of equations. [Hint: Let u = and v = , and solve for u and v. Then let x = , and y = .]


4 points

QUESTION 24

  1. Solve the system of equations by substitution.


4 points

QUESTION 25

  1. Solve the system of equations by substitution.


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