First one (20 characters) hope this helped
Answer:
It will take 17.5 minutes to reach 50 degrees F.
Step-by-step explanation:
Current temperature = -13 degrees F
With the engine on, the temperature goes up by 3.6°F per minute.
Let us assume that it takes x minutes to reach 50 degrees F.
So, the time taken will be =

=> 
=> 
x = 17.5 minutes
The expression that tells how much the temperature needs to change from -13°F to 50°F is : 
It will take 17.5 minutes to reach 50 degrees F.
Given
there are 2.5 oranges per Pound
and 1.2 Grapefruit per Pound
In $ 50 one can buy 40 Pound Oranges
i.e. Oranges is
In 50 $ one can buy 55 Pound Grapefruit
i.e. Grapefruit is
If we have Enough money to buy 28 Pounds of Grapefruit
In 24.45 $ we can bought
19.56 pounds meaning
9/8 because in dividing you multiply by the reciprocal so 3/4 x 3/2= 9/8