Answer:

Step-by-step explanation:
Look at the picture.
Use the Pythagorean theorem for calculate the length of CA:

We have

Substitute:

subtract 100 from both sides

ΔADC and ΔACB are similar. Therefore the corresponding sides are in proportion:

We have:

Substitute:

cross multiply
divide both sides by 5

If you mean the length of segment CD, then use the proportion:

Substitute:

Answer:
3.75
Step-by-step explanation:
4x+9=24
4x=24-9
4x=15
x=15/4
x=3.75
Answer:
Don't really understand the question, but