QuickHelper

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Teaching Since: May 2017
Last Sign in: 352 Weeks Ago, 4 Days Ago
Questions Answered: 20103
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    Phoniex
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Category > Engineering Posted 01 Sep 2017 My Price 11.00

systems of equations

correctly answer and provide explanation

A student solves the system of equations given below. In which line is an error first made?

2x -­ y = 6 
2x + y = 10

Line 1 2x -­ y = 6 
- ­2x + y = ­10 
Line 2 0 = ­4 
Line 3 0 ≠-4 so there is no solution

a. Line 1

b. Line 2

c. Line 3

d. There is no error

===========================================================================

Which of the following situations would give you a system of equations that have at least 2 solutions?

a.Two lines are parallel and have different y­-intercepts.

b. Two lines have the same slope and both pass through the origin.

c. Two lines are perpendicular and have the same y-intercept.

d. Two lines have negative slopes and different y­-intercepts. 

============================================================================

What is the best estimate for the solution to the system of equations shown on the graph below?

a. (2, 3)

b. (3, 2)

c. (2.5, 3.5)

d. (3.5, 2.5)

==================================================================================

Solve the system of equations.

3x = ­-31 + 2y 
5x + 6y = 23

a. x = ­-5, y = 8

b. x = ­- 29, y = ­- 28

c. no solution

d. infinite solutions

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Solve the system of equations.

6d + 3f = 12

2d = 8 ­- f

a. d= 3, f = 2

b. d = 3, f = 14

c. no solution

d. infinite solutions

-------------------------------------------------------------------------

Which of the following systems is consistent and dependent?

a. y = x + 4; y = x -­ 4

b. x + y = 4; 2x + 2y = 6

c. 3x + y = 3; 2y = 6x + 6

d. 4x ­- 2y = 6; 6x -­ 3y = 9

=================================================

Which graph shows a system of equations with no solution?

A.

B.

C.

D.

 

===============================================================

The caterer at a brunch bought several pounds of chicken salad and several pounds of tuna salad. The chicken salad cost $9 per pound, and the tuna salad cost $6 per pound. He bought a total of 14 pounds of salad and paid a total of $111. How much chicken salad did he

buy?

a. 6 pounds

b. 7 pounds

c. 8 pounds

d. 9 pounds

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In order to practice at home, Tadeo purchased a basketball and a volleyball that cost a total of $67, not including tax. If the price of the basketball b is $4 more than twice the cost of the volleyball v. Which system of linear equations could be used to determine the price of each ball?

a. b + v = 67; b = 2v ­- 4

b. b + v = 67; b = 2v + 4

c. b + v = 4; b = 2v ­- 67

d. b + v = 4; b = 2v + 67

===================================================================

Which of the following best describes the graph of the equations?

4y = 3x + 8 
-6x = ­-8y + 24

a. The lines are parallel

b. The lines have the same x­-intercept

c. The lines are perpendicular

d. The lines have the same y­-intercept

Answers

QuickHelper
(10)
Status NEW Posted 01 Sep 2017 05:09 PM My Price 11.00

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