Hi there!

Since one of the angles in this set of 2 lines is a right angle, we know that every other angle is a right angle because vertical angles are congruent and that because each line has a total of 180 degrees.

Thus, Angle NDA and RDY are both 90 degrees and add up to 180 degrees.

Since the two angles add up to 180, they are supplementary angles.

Also, we should notice that those two angles are across each other. Thus, they are also vertical angles.

Your answers are choices B and C.

Have an awesome day! :)

6 0

3 years ago

(11x - 1)<br> (20x – 3)<br> 151°

IgorC [24]

Answer:

x= 1.6 degrees

Step-by-step explanation:

to find the missing angle 180 degrees - 151 degrees

29° is the missing angle at the bottom ryt of the triangle.

all angles in triangle add upto 180°

so, 20x-3°+11x-1°+29°= 180°

31x=180°-25°

x= 1.6°

4 0

4 years ago

Keelah’s Clothing Store buys coats for $50 and then sells them for $80. What is the percent of mark up on the price of the coat?

Kaylis [27]

Mark up % = gross profit over cost of sales time 100 (80-50)/50 x 100 = 60% mark up

5 0

3 years ago