What is a simpler form of the following expressions?
(j + 7)(j - 7)
a. j² +14j - 49
b. j² - 14j - 49
c. j² + 14j - 49
d. j²- 49

What is the solution of log2  (3x  -  7)  =  3? 4 5

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. how many hours after the truck's departure will the two meet?

Which expression is rational? 6. , square root two, square root 14, square root 49