Answer:
3
Step-by-step explanation:
3
. It’s a special triangle. 30, 60, 90.
the side across from 60 is always x
With the side across from 30 being x.
The answer is b because 7 plus 2 equals 9 and a equals whole amount then his current amount is A-9
Answer: Regression line equation: 
Step-by-step explanation:
Equation of least-squares regression line for predicting y :

, where
, 
Given: 
Then,

Now,

Then, Regression line equation: 
Answer:
1 in 4,
Step-by-step explanation:
You should know that a standard 52-card deck is made up of four suits of 13 cards each. This means that there are 13 spades and 4 aces (the Ace of Spades is both). So the probability of drawing any spade is 1 in 4, and the probability of drawing any ace is 1 in 13.