3 years ago

Can someone explain the steps for how do solve this?! I can’t get it right

Mathematics

1 answer:

Ulleksa [173]3 years ago

6 0

Answer:

x = 50

m∠D = 150°

m∠F = 30°

Step-by-step explanation:

supplementary angles are two angles whose sum is 180°

∠D + ∠F = 180°

3x + x - 20 = 180

3x + x = 180 + 20

4x = 200

x = 200/4

x = 50

D = 3*50 = 150

∠D = 150°

F = 50 - 20 = 30

∠F = 30°

You might be interested in

Use substitution to determine if O is a solution of 5x = 5.<br><br><br> HELP!

mojhsa [17]

Answer:

x=1

Step-by-step explanation:

5x1=5

4 0

3 years ago

Read 2 more answers

4. Kiran's uncle is 54 years old. He is 8 years older than three times Kiran's age. Find Kiran's age,

levacccp [35]

Kiran's age = x

Uncle's age = 54

Also,

Uncle's age = 8 + 3x

Now,

8 + 3x = 54

3x = 54 - 8

3x = 46

x = 46/3

x = 15.33

x = 15 (rounded)

7 0

3 years ago

On Saturday, Craig rode his bike 5/8 of a mile. On Sunday, he rode his bike 1/2 of a mile. Craig added 5/8 + 1/2 to find the tot

saul85 [17]

Hi there!

Craig's reason is not reasonable because when you add fractions you have to find equivalent fractions.

The total distance in miles would be 1 1/8 miles.

By using a number line, line up the fractions, so then you could add them both.

Hope this helps :)

8 0

3 years ago

The velocity of a ball is thrown up is 20 meters/second. It attains zero velocity after 3.5 seconds. What is the average acceler

Reptile [31]

Average acceleration: ( v - v o ) / Δ t
v = 0 m/s, v o = 20 m/s, Δ t = 3.5 s
a (average) = ( 0 m/s - 20 m/s )/3.5 s = - 20 m/s / 3.5 s =
= - 5.7142857 m/s² ≈ - 5.71 m/s²

7 0

3 years ago

Read 2 more answers

In the figure, if CD = 15 cm, then BC ≈ cm.

Alona [7]

Check the picture below.

make sure your calculator is in Degree mode, since the angles are in degrees.

3 0

3 years ago

Read 2 more answers