The answer is -2.5. this is how you work it out.
21.4 + (-23.9) = -5/2 = -2.5
You would first have to convert 5 gallons into ounces. There are 128 ounces in 1 gallon. So 128×5= 640. Now you have 640 ounces. Since Rick is trying to see how many hours it will take to be half full, you divide. So 640÷2=320. Now you have 320 ounces. Now we can find out how many hours it will take by dividing by 5. So 320÷5=64. It will take 64 hours to get Rick's bucket to be half full.
Answer:

Step-by-step explanation:
According to the problem, the initial condition is $200. If he owed $100 after 4 weeks, that means he paid $25 per week, so that would be the constant ratio. Therefore, the expression would be:

Where
represents the amount owed, and
represents weeks.
So, in the 4 week, that is,
he owed:

As you can observe, the relation we found first perfectly to the problem. So, the final expression that model this problem is

Answer:
To find the surface area of a rectangular prism, measure the length, width, and height of the prism. Find the area of the top and bottom faces by multiplying the length and width of the prism. Then, calculate the area of the left and right faces by multiplying the width and height.
Answer:
The only solution is c=1
Step-by-step explanation:
c^2 - 2c + 1 = 0
What 2 numbers multiply to 1 and add to -2
-1 * -1 =1
-1 + -1 =-2
( c-1) (c-1)=0
Using the zero product property
c-1 =0 c-1 =0
c=1 c=1
The only solution is c=1