Answer: 3.5 minutes per problem
Step-by-step explanation: To find the average divide 49 by 14 to get 3.5.
Answer: 
Explanation:
The equation of the unit circle is 
Plug in y = -2/7 and solve for x

Can you repost this with a picture please ?
Answer:

Step-by-step explanation:
There are

different ways to select the four numbers between 1 and 42. Only one of this ways is correct (successful to win).
There are 30 different ways select the single number between 1 and 30. Only one of them is correct.
The probability of winning the jackpot is
