Homework Quiz 7-MATH.10.HFS1

Homework Quiz 7

Question

Question text

Determine if (7, 6) is a solution of the system2x – 3y = -4

2x + y = 4.

Select one:

A.

Yes

B.

No

C.

Can’t determine

Question 2

Question text

Solve the systemx + y = 6

3x – y = 6.

Select one:

A.

(1, -3)

B.

(3, 3)

C.

(-3, 9)

D.

(2, 0)

Question 3

Question text

Solve the systemy = 3x – 10

y = 3x + 1

Select one:

A.

(1, -7)

B.

(1, 4)

C.

(2, -4)

D.

No solution

Question 4

Question text

Solve the system3x – 6y = 12

x – 2y = 4

Select one:

A.

(2, -1)

B.

(4, 0)

C.

No solution

D.

Infinitely many solutions

Question 5

Question text

When solving the system5x – 4y = 9

x – 2y = -3,

what is the best first step?

Select one:

A.

Rewrite the second equation as x = 2y – 3.

B.

Rewrite the second equation as y = (1/2)x + 3/2

C.

Rewrite the first equation as x = (4/5)y + 9/5

D.

Rewrite the first equation as y = (5/4)y – 9/4

Question 6

Question text

Solve the system5x – 4y = 9

x – 2y = -3.

Select one:

A.

(1, -1)

B.

(4, 5)

C.

(5, 4)

D.

No solution

Question 7

Question text

Solve the system2x – y = 6

3x + 2y = 5

Select one:

A.

(4, 2)

B.

(17/7, -8/7)

C.

(17, -8)

D.

No solution

Question 8

Question text

Solve the systemy = (-1/2)x + 2

y = (3/4)x + 7.

Select one:

A.

(-4, 4)

B.

(-1/2, 3/4)

C.

(0, 2)

D.

No solution

Question 9

Question text

When using the addition method to solve the system4x – y = 22

3x + 4y = 26,

what is the first best step?

Select one:

A.

Add the first equation to the second equation.

B.

Multiply 4 to each of the first equation and add the equations.

C.

Multiply -4 to each of the first equation and add the equations.

D.

Multiply 3 to each of the first equation and 4 to each of the second equation and add them.

Homework Quiz 7

Question 10

Question text

Solve the system4x – y = 22

3x + 4y = 26.

Select one:

A.

(8, 0)

B.

(5, -2)

C.

(6, 2)

D.

No solution

Question 11

Question text

Solve the system7x – 4y = 13

-7x + 6y = -11.

Select one:

A.

(1, -3/2)

B.

(17/7, 1)

C.

(1, 2/3)

D.

No solution

Question 12

Question text

Solve the system4x – y = 22

-4x + y = 26.

Select one:

A.

(5, -2)

B.

(-5, 6)

C.

(7/25, -1/25)

D.

No solution

Question 13

Question text

Solve the system2x – y = 3

4x + 4y = -1.

Select one:

A.

(11/12, -7/6)

B.

(11/12, 7/6)

C.

(33/16, 3/8)

D.

No solution

Question 14

Question text

Consider the following problem:A rectangular lot whose perimeter is 1600 feet is fenced along three sides. An expensive fencing along the lot’s length costs $20 per foot. An inexpensive fencing along the two side widths costs only $5 per foot. The total cost of the fencing along the three sides comes to $13,000. What are the lot’s dimensions? You need not solve the problem.

If x is the length of the expensive side and y is the length of an inexpensive side, what is the algebraic expression for the statement “A rectangular lot whose perimeter is 1600 feet is fenced along three sides?”

Select one:

A.

x + y = 1600

B.

2x + 2y = 1600

C.

x + 2y = 1600

D.

2x + y = 1600

Question 15

Question text

Refer to Question 14):Consider the following problem:

A rectangular lot whose perimeter is 1600 feet is fenced along three sides. An expensive fencing along the lot’s length costs $20 per foot. An inexpensive fencing along the two side widths costs only $5 per foot. The total cost of the fencing along the three sides comes to $13,000. What are the lot’s dimensions?

What is the algebraic expression for the statement “The total cost of the fencing along the three sides comes to $13,000?”

Select one:

A.

20x + 5y = 13000

B.

x + y = 13000

C.

5x + 20y = 13000

D.

20x + 10y = 13000

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Homework Quiz 7