Answer:
12√2.
Step-by-step explanation:
You can do this by the Pythagoras theorem:
20^2 = x^2 + (4sqrt7)^2 where x is the distance required.
x^2 = 20^2 - (4sqrt7)^2
= 400 - 112
= 288
x = √288
= √144 *√2
= 12√2.
If you scroll up I answered a previous question like this in the same subject
4 is the contestant in the expression
Answer:
x=4y+3
Step-by-step explanation:
I don't know if this is right or not. Please tell me if it is.
