A plane left Kennedy airport on Tuesday morning for an 630mile 5 hour trip for the first part of the trip the average speed was 120 mph for the remainder of the trip the average speed was 130 mph how long did the plane fly at each speed

The plane travelled for at an average of speed and at an average speed of .

Step-by-step explanation:

Let denote the number of hours that the plane travelled at an average speed of .

Given that the trip is long in total, the plane would have travelled at an average speed of for .

The plane would have travelled miles after at an average speed of . Likewise, the plane would have travelled after at an average of .

The plane has travelled in total. In other words:

.

Solve this equation for : .

In other words, the plane has travelled for at an average of speed . It would have travelled for for the other part of the trip (at an average speed of .)

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500

41*67/2=1373.5

step-by-step explanation:

i just used a calculator