Since 16 cups = a gallon, u multiply 20 times 16, the answer is 320, there are 320 cups within 20 gallons.
Answer:
(3138.29, 3705.11)
Step-by-step explanation:
Given that for sample size of n = 50 male athletes from eight Canadian sport centers surveyed, the average caloric intake was 3077.0 kilocalories/day with a sample standard deviation of 987.0.
The recommended amount = 3421.70
To construct 95% confidence interval
Since population std deviation is not known we use t critical value for degree of freedom 50-1 =49
t critical = 2.010
Hence margin of error = 
Confidence interval lower bound = 
Confidence interval upper bound = 
Conf interval = 
Answer:
x=23
y=12
Step-by-step explanation:
Start by making two separate equations. One for each answer it gives you. So you know you will have two different numbers, therefore you need two different variables. I'm going to use x and y. The first part of the sentence says that the sum is 35 meaning we are going to add two numbers to get 35.
x+y=35
The second part says the difference of two numbers is 11, which means you are subtracting two numbers to get 11.
x-y=11
Now you can either decide to you substitution or elimination. I prefer elimination, so thats what I will be using. To do this you need to line up both equations.
x+y=35
x-y=11 Now you can add straight down. x+x=2x; y-y=0; 35+11=46. Write out what you have left
2x+0=46 You do not have to write the zero in the equation, I did so that you could see that the y's cancell each other.
It can also look like this 2x=46. Now you need to divide by 2 to get x by itself.
x=23
To find y you take the 23 and plug it for x in one of the equations you started with. I'm going to use the (x+y=35). No matter whihc you use your answer will be the same.
23+y=35 Subtract the 23 over to get y alone.
-23 -23
y=12
