If the combined correlation is .87 is its relationship considered to be strong positive, weak positive, strong negative, weak negative, or no correlation

Mary had at least an 80% on her test write an inequality to represent this situation

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?

What is the distance from zero if a quadratic function has a line of symmetry at x=-3 and a zero at 4