The altitude a (in feet) of a plane t minutes after liftoff is given by a=3400t+600. How many minutes after liftoff is the plane at an altitude of 21,000 feet?

What does a=3n+1 and solve for n

A car travel 35 miles on 3 gallons of gasoline. How many gallons of gasoline will the car need to travel 150 miles?

Brent works part-time at a clothing store. He earns an hourly wage of $15. If he needs to earn more than $45 in a day and works for x hours a day, which inequality represents this situation?

When asked to factor the trinomial, a student gives the answer (x - 7) (x + 7). Which of the following statements is true?

Solve for d: 6d^2+5d=1

A shop owner pays $5400 intakes, which is 15℅ of his gross earning in a year. What is his annual amount?

A plus 5 is the side of an equilateral triangle. find it's perimeter

Which best describes independent events? The results of all events have different individual probabilities. The results of any previous events affects the probability of future events. The results of all events have the same individual probability.

6 more than a number w is 2

Eloise is planning on retiring soon. When she first began working she invested $1500 in a retirement fund. The percent increase in her investment is 95%. How much does she have in the account now? A) $1,425 B) $2,925 C) $5,850 D) $142,500