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larisa86 [58]
3 years ago
12

Brainliest!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics
1 answer:
Genrish500 [490]3 years ago
6 0

Answer:

4

Step-by-step explanation:

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What is the result of subtracting the second equation from the first ? -7x-y=0 and 7x+8y=-6
hoa [83]

Answer:

- 14x - 9y = 6

Step-by-step explanation:

- 7x - y = 0 → (1)

7x + 8y = - 6 → (2)

Subtracting (2) from (1) term by term

- 7x - 7x - y - 8y = 0 - (- 6)

- 14x - 9y = 0 + 6

- 14x - 9y = 6

5 0
3 years ago
Trains Two trains, Train A and Train B, weigh a total of 192 tons. Train A is heavier than Train B. The
OleMash [197]

Hi there!

So we know that the two train together is a total of 192 tons and the difference of their weights is 120 tons...

Ok let think...

When we’re looking at the once place, you’ll see a two... this means that the two train both have a ending of 1 since 2 is split into 1...

That would be another clue..

Now let think again...

If it would be 151 and we subtract by 120.. we would get...

151-120=31

Well it ends with a 1 so it would be perfect but we have to see if 151 and 31 together adds up with the total of 192..

151+31=192

This means that train A could be 151 tons or 31 tons and train B can also be wither 151 tons or 31 tons...

6 0
3 years ago
Write a story problem that represents 528 ÷ 24.
Minchanka [31]
$528 was raised by a team of 24 students. If it's divided evenly among them, how much money will each student earn?
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3 years ago
Would it be easier for Dana from problem 3-68 to find a single 12-foot board of clear wood rather than four clear 3-foot pieces?
Tanzania [10]
Yes Dana is correct because he is black and it’s Black Lives Matter month
8 0
3 years ago
The heights of two similar cylinders are 3cm and 4cm respectively. The total area of the bigger cylinder is 400cm².Calculate the
shusha [124]

Answer:

Step-by-step explanation:

Total surface area = 2πr(r+h)

If the total area of the bigger cylinder is 400cm² and radius is 4cm, then;

400=2(3.14)(r)(r+4)

400= 6.26r(r+4)

400=100.48 + 25.12h

299.52 = 25.12h

H = 299.52/25.12

H = 11.92cm

For the smaller cylinder

The height is calculated as;

H/h = R/r

11/92/

8 0
3 years ago
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