Answer:
21) x = 0
23) x = 7
Step-by-step explanation:
In a parallelogram, the opposite sides are congruent. Using this fact, we can create equations for both problems.
21)

Subtract 18.

Divide by 2.

23)

Add 3.

Divide by 2.

Answer: 
Step-by-step explanation:
1. You know that the high-speed camera is ready to film him between 15 meters and 10 meters above the ground.
2. The problem gives you the following equation:

3. Therefore, you must calculate the time when
and when
, as following:

4. Therefore, the answer is:

Answer:
cos(E)=0.8
Step-by-step explanation:
cos(E)=adjacent/hypotenuse
Using a common pythagorean triple, we can find that side GE is 30 (18^2+24^2=30^2)
Then we just get cos(E)=24/30, which is 0.8
Thank you for the no question lol have a nice nite!!! And Happy Thanksgiving
Eh that ones hard you sure thats all the ansers