Unit 3 Study Guide (Parallel & Perpendicular Lines)

Topic 5: Parallel, Perpendicular, or neither?!

For questions 22 - 25 , determine if the lines are parallel, perpendicular or neither.

22. 6x + 10y = 20 and 5x - 3y = 21

23. x - y = 4 and x + y = 9

24. x - 5y = 30 and 10y = 2x + 90

25. x = 5 and x = - 2

c

step-by-step explanation:

37/3

step-by-step explanation:

step 1: simplify both sides of the equation.

7x+8(x+

1

4

)=3(6x−9)−8

7x+(8)(x)+(8)(

1

4

)=(3)(6x)+(3)(−9)+−8(distribute)

7x+8x+2=18x+−27+−8

(7x+8x)+(2)=(18x)+(−27+−8)(combine like terms)

15x+2=18x+−35

15x+2=18x−35

tep 2: subtract 18x from both sides.

15x+2−18x=18x−35−18x

−3x+2=−35

step 3: subtract 2 from both sides.

−3x+2−2=−35−2

−3x=−37

step 4: divide both sides by -3.

−3x

−3

=

−37

−3

x=

37

3