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Katen [24]
2 years ago
13

Which of the following is the correct expression for:

Mathematics
1 answer:
Nostrana [21]2 years ago
4 0

I think it's B (sorry if wrong)

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Please answer.........
vodka [1.7K]
1. 4   5.-22       9.-60       13.-85
2.-7      6.-33       10.33       14.-21
3.-36    7.87        11.-78      15.-23
4. 78    8.55        12.24       16.149
7 0
3 years ago
If I had 15 acres and I got $237,000 for it, how much is each acre? ​
serg [7]

For the price per acre do 237,000 / 15 = $15800 per acre

4 0
3 years ago
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M is the midpoint of , cm = 2x + 3, and md = 3x – 6. what is cd? answer
wlad13 [49]
<span>If M is the midpoint of CD, CM = 2x+3 and MD = 3x-6, then:

MD = CM
3x - 6 = </span>2x + 3
3x - 2x = 3 + 6
x = 9

CM = 2x+3 = 2*9+3  18+3 = 21
MD = CM = 21
CD = CM + MD = 21 + 21 = 42
7 0
3 years ago
PLS Helps A box had a length of 23 foot, a width of 12 foot and a height of 2 feet. What is the volume of this box?
vodka [1.7K]

Answer:

23 times 12 times 2= 552. but i dont understand the last part so think there is a typo

Step-by-step explanation:

8 0
3 years ago
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A riverboat travels 54 km downstream in 2 hours. It travels 57 km upstream in 3 hours. Find the speed of the boat and the speed
irakobra [83]

Here we must write and solve a system of equations to find the speed of the boat and the speed of the stream. We will find that the boat's speed is 23km/h and the river's speed is 4km/h.

First, remember the relation:

Distance = Speed*Time.

Now let's define the variables we will be using:

  • B = boat's speed
  • R = river's speed.

When the boat travels downstream, the total speed of the boat is the speed of the boat plus the speed of the river, and we know that in that case it travels 54km in 2 hours, then:

54km = (B + R)*2h

When the boat travels upstream, we must subtract the speed of the river. In that case, we know that the boat travels 57km in 3 hours, then we have:

57km = (B - R)*3h

Then our system of equations is:

54km = (B + R)*2h

57km = (B - R)*3h

To solve this, first, we need to isolate one of the variables in one of the equations, let's isolate B in the second one:

57km = (B - R)*3h

57km/3h + R = B

19 km/h + R = B

Now we can replace that in the other equation:

54km = (B + R)*2h

54km/2h = B + R

27 km/h = B + R = (19 km/h + R) + R

Now we can solve this for R:

27 km/h = 19km/h + 2*R

27 km/h - 19km/h = 2*R

8 km/h = 2*R

(8km/h)/2 = 4km/h = R

Now that we know the value of R, we can use:

B = 19 km/h + R  = 19 km/h + 4km/h = 23 km/h

So the boat's speed is 23km/h and the river's speed is 4km/h.

If you want to learn more, you can read:

brainly.com/question/12895249

5 0
2 years ago
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