Be Bell Work
1) Which quantities are
located to the right of zero on
a number line? Select ALL that
apply
A) - (-7)
B) The opposite of - (4)
C) – 3.5
D) The opposite of -(-8)
E) - (3)

answer: x=3 and y=4

step-by-step explanation:

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

( - 4 , -7 )

all the lines must parallel  

step-by-step explanation:

coordinates of c = ( - 1 , 2 )

3 units left = ( -4 , 2 )

9 units down = ( - 4 , 11 )

answer: they are supplementary angles

step-by-step explanation: 161+19=180. supplementary angles equal 180 degrees