Estimate each one-sided or two-sided limit, if it exists lim x → -1^+ (x + 7)/(x^2 + 8x + 7)

According to statistics a person will devote 32 years to sleeping and watching tv. the number of years sleeping will exceed the number of years watching tv by 18. over a lifetime, how many years will the person spend on each of these activities

Write a function for a rotation 90 degrees counter clockwise about the origin, point 0

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?