Question

i need some answers checked 2: Electric boogaloo

Answer 1

good

Answer 2

good

Answer 3

if they're both parallel to a third line that means lines1 and 2 must be parallel to each other, so true

Answer 4

good

Answer 5

good

Answer 6

huh

the postulate normally assumes that you know the lines are parallel
we don't know that yet, so we are stating that

2 is congruent to 6
6 is congruent to 8
therefore 2 is congruent to 8

which should be the transitive property

Answer 7

good

Answer 8

good

Answer 9

in general consecutive interior angles are not congruent, they'd be supplementary so false

Answer 10

hm, not quite, 6 and 12 are not corresponding angles (they would have to be in the same position and orientation)

notice how 6 and 12 are on the outside side of the parallel lines, making them interior or exterior?

Answer 11

exterior

Answer 12

good so B

Answer 13

good

Answer 14

hm not quite

CE = ED

5x + 80 = 7x - 2

solve for x, then plug back into AE = 4x + 5

Answer 15

x=41

Answer 16

good now plug that into 4x + 5

Answer 17

may I see what the proof is?

Answer 18

good

Answer 19

hm not quite

3x - 30 = 90 since its a right angle

solve for x

Answer 20

40

Answer 21

not quite, they don't have to be perpendicular, the angles just have to add up t o 180

Answer 22

good

Answer 23

hm

x = 41 right

so CE = 285
CD = 2*CE = 570

to account for both sides of the rectangle

570 + 570 = 1140

applying this same logic to AE

AE = 169
AB = 2*169 = 338

338 + 338 = 676

so 1140 + 676 = 1816 (A)

Answer 24

basically your previous answer only accounted for half the perimeter

Answer 25

good

Answer 26

since the end of the fence makes 90 degree angles w/ the sides of the fence by definition the sides of the fence are perpendicular to the end fence

so B can't be the solution (we are looking for a false statement)

any other ideas?

Answer 27

A?

Answer 28

if the rows of crops are parallel to the sides

and the sides are perpendicular to the end of the fence

therefore the rows of crops are perpendicular to the end of the fence making A a true statement so it cannot be the solution

Answer 29

let's look at statement C

the original problem never states that rows of crops are parallel to the sides of the fence

making C the solution

Answer 30

hm, not quite

AE is 169 but it's asking for CD

we solved that x = 41 right?

so CD = 5x + 80 + 7x - 2 = ?

Answer 31

570

Answer 32

good so 570 = your sol'n

Answer 33

if its perpendicular to the first line it has to be perpendicular to the second line if the two lines are parallel

so true

Answer 34

because <1 and <2 are in the same orientation with respect to the transversal they are ~corresponding angles~

Answer 35

not quite

there's only one possible line that can be drawn through P and be perp. to line l

Answer 36

for a y-intercept, the x-coordinate must be 0

so it can't be A

Answer 37

good

Answer 38

hm not quite

to find the y-intercept, let x = 0 and solve for y in

3x + 4y = 12

Answer 39

4.

Answer 40

3(0) + 4y = 12

4y = 12

y = ?

Answer 41

8

Answer 42

4 is being multiplied by y

so you have to divide both sides by 4 not subtract

Answer 43

3.

Answer 44

good so 3 = your sol'n

Answer 45

hang on, i actually think this is zero

Answer 46

a horizontal line has slope 0 not undefined

Answer 47

good

Answer 48

hm not quite

remember that a vertical line only has an x not a y

take the standard form equation

Ax + By = C

and replace y with 0

Answer 49

try to apply this logic to your problem to calculate the slope m

Answer 50

so just 8/-2

Answer 51

-4

Answer 52

careful with your signs

(8-0)/(0 - (-2)) = 8/2 not 8/-2 so 4 not -4

Answer 53

good

Answer 54

that's point slope form

standard form should look like Ax + By = C

Answer 55

so D

Answer 56

good

Answer 57

not quite

if the equation is y = mx that means it has to pass through the point (0,0)

Answer 58

which of the four lines crosses the origin?

Answer 59

notice how only b crosses (0,0)

so only line b can be the correct sol'n