How many gallons of orange juice worth $1.70 per gallon should be mixed with 100 gallons worth $2.20 per gallon to produce a mixture which will sell for $2.10 per gallon?

25 gallons

Step-by-step explanation:

Let x be the number of gallons of orange juice worth $1.70 per gallon, then x gallons are worth $1.70x.

If 100 gallons of orange juice worth $2.20 per gallon, then 100 gallons are worth

Total cost is

Together we will get x + 100 gallons of a mixture.  This mixture we will sell for $2.10 per gallon, so, x + 100 gallons of mixture is worth $2.10(x + 100).

Thus,

1760 kilometers

step-by-step explanation:

multiply the amount of time the plane took to travel by it's speed

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

hope this