Which would be the best method to use to solve the following equations. Explain your reasoning. 1. x^2 - 49 = 0 2. x^2 - 3x - 4 = 0 3. x^2 - 2x - 6 = 0 4. x^2 - 17x + 7= 0 ​

How do i put 3(x+7) in distributive property

Jonathan can type 20 documents in 40 minutes ,and susan can type it in 30 minutes and jack can type it in 24 minutes working together ,how much time will it is take them type the same document

Using pert, adam munson was able to determine that the expected project completion time for the construction of a pleasure yacht is 21 months, and the project variance is 4. a) what is the probability that the project will be completed in 17 months? b) what is the probability that the project will be completed in 20 months? c) what is the probability that the project will be completed in 23 months? d) what is the probability that the project will be completed in 25 months? e) what is the due date that yields a 95% chance of completion?