Answer:
m∡GHI = 21°
Step-by-step explanation:
Since the lines are intersecting, GHI and JHK are opposite angles, so they are the same measure.
That means you can set them equal to each other
x + 7 = 3x - 21
x = 14
Now plug x into GHI
14 + 7 = 21
m∡GHI = 21°
Is BC=2.3 one of the options?
For that question, you can use the cosine rule, where;

In this case, we have..

Solving for BC with this will get you 2.250406, rounded off to the tenth is 2.3.
I hope this helps you
x.x-2.3x+9-21=0
(x-3)^2-21=0
(x-3)^2=21
Answer:
9/2
Step-by-step explanation:
9-3=6 and (1/3+1)=4/3
The answer is 6/(4/3)=9/2
Answer:
Ratio = 34:39
Step-by-step explanation:
We are given the following in the question:
Time spent on filming first movie =

Converting intro weeks:

Time spent on filming second movie =

We have to find the ratio of filming time.
Ratio =

Thus, 34:39 is the ration of the first movies filming time to the second movies filming time.