Answer:
43.98ft
Step-by-step explanation:
F(x) = -20x + 2560....x represents number of minutes
domain is ur x value(ur minutes) and the range is ur f(x) value (or y value)...which is the total amount of water left in the tank
x f(x) = -20x + 2560 y
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10 f(10) = -20(10) + 2560 2360
20 f(20) = -20(20) + 2560 2160
30 f(30) = -20(30) + 2560 1960
60 (1 hr) f(60) = -20(60) + 2560 1360
let me break it down for you..
at 10 minutes, there will be 2360 oz of water in the tank
at 20 minutes, there will be 2160 oz of water in the tank
at 30 minutes, there will be 1960 oz of water in the tank
at 60 minutes (or 1 hr), there will be 1360 oz of water in the tank
<h3>Answers:</h3>
- 7. D
- 8. C
- 9. D
- 10. D
- 11. C
- 12. B
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Explanation:
The result of problem 7 is undefined because the matrices are not the same size. Both matrices must have the same number of rows, and they must have the same number of columns. This is so the terms match up when we add them. This applies to question 9 as well because subtraction is a form of addition.
For problem 8, we add the corresponding terms. So for instance, along the top we have -2+(-3) = -5 as the first entry in the top row. So that's why the answer is C for problem 8. Problem 10 and 11 are similar to this. Be careful to distribute the negative through to each term in the second matrix when subtracting matrices.
For problem 12, we multiply the outer 3 by each term inside the matrix. We end up with choice B.
Answer: for a, I got 1/8 and for b. I got 10/15 because your taking away .5 to get a cup so you would have 10/15 left from the original amount
Step-by-step explanation:
10 more blue cars for the ratio to be 1 to 2 because 15/15 is 1 and 30/15 is 2 so it 1 to 2