Abeka 9th Grade Algebra 1 Test 5 (Chapter 5)

An inconsistent system of equations has no solution

true

the solution to a system of equations is an ordered pair

true

a system of ___________________ lines does not intersect

parallel

to eliminate the y terms from the following system of equations the first equation must be multiplied by 5 and the second equation must be multiplied by 4.

x-4y=11

-3x+5y=25

true

2x-7y=11 (2,-1)

3x+5y=1

Solution or not a solution

solution

9x+4y=21 (-3,12)

3x-y=-3

Solution or not a solution

not a solution

4x-5y=-10 (5,6)

7x-3y =17

Solution or not a solution

solution

2x-8y=9 (1/2, -1)

6x + 2y = 1

Solution or not a solution

solution

Solve system by graphing -

x+3y=6

2x - 4y=12

(6,0)

Solve system by graphing -

2x - 6y = 12

x + y = 2

(3,-1)

System solving - solve by substitution

x-y=4

4y - x = 14

(10,6)

System solving - solve by substitution

x + 4y = -10

2x - y = 7

(2, -3)

System solving-solve by substitution

2x + 3y = 7

x+y = 3

(2, 1)

System solving - solve by elimination

3x - 4y = 26

5x + 4y = 38

(8, -1/2)

System solving - solve by elimination

35 x + 28y = 56

12x + 28y = 56

(0, 2)

System solving - solve by elimination

2x + 4y = 4

3x - 6y = 12

(3, -1/2)

The local music activities coordinator sold 300 tickets to the orchestra concert. Student tickets were $4 and adult tickets were $6. If the total sales were $1600 how many student tickets were sold?

x=student tickets

y=adult ticks

$4x+$6y=$1600

x+y=300

There are 32 students in Cody's class. If there were twice as many girls in the class, the total number of students would be 45. How many girls are in Codys class?

x = girls

y= boys

x+y=32

2x+y=45