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Galina-37 [17]
4 years ago
14

Which method is best using this equation 4x-2y=-2,-5x+6y=-15 and why

Mathematics
1 answer:
kipiarov [429]4 years ago
8 0
I think that using the elimination method is the best, because it is the only method that I use when solving these types of equation. For example, for these two equations, you need to multiply one of the equations by a certain number so that you'd be able to find x and y. The elimination method is the method that tells you to do that. It is also the easiest method.

~Hope I helped!~
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A force of 200 Newtons is applied to a machine to lift a 1,000 Newtons load. What is the MA of the machine?
vovikov84 [41]

Answer:

5

Step-by-step explanation:

The mechanical advantage of a machine is the ratio of the force that you need to input to how much is outputted. 200:1000=1:5, meaning that the mechanical advantage is 5. Hope this helps!

3 0
3 years ago
Five added to 6 times a number is equal to 2 less than 8 times the number. What is the number?
Morgarella [4.7K]
30N=2-8N

Subtract 8N from 30N and you get 22N.

22N=2

Divide by 22 on both sides. You get N=2/22

So your answer is N=1/11
8 0
4 years ago
A laptop computer is purchased for $2700. Each year, it’s value is 70% of its value the year before after how many years will la
n200080 [17]

<u>Answer:</u> 5 years!

<u>Reasoning:</u>

Year 1: 2700 x .70=1890

Year 2: 1890 x .70= 1323

Year 3: 1323 x .70= 926.1

Year 4: 926.1 x .70= 648.27

Year 5: 648.27 x .70=453.79

3 0
3 years ago
How do I write 2.8 as a fraction?
ruslelena [56]
Well you see, you have 2/8, (fraction) and here is a few others,
These are COMMON. 4/16, 2/8, 6/24, etc.... 
You multiply the denominator and numerator by the same answer.
Thats how I think I learned it.
5 0
3 years ago
Read 2 more answers
The​ U.S.-based motorcycle manufacturer says that it expects to build 139,000 motorcycles this​ year, up from 122,000 last year.
NemiM [27]

Solution:

we are given that

The​ U.S.-based motorcycle manufacturer says that it expects to build 139,000 motorcycles this​ year, up from 122,000 last year.

It mean the increased production is 139,000-122,000=17000

The percentage change in production can be found using the formula as below

Percenatge  \ increase=\frac{change}{Initial}*100\\&#10;\\&#10;\text{Substitute the values we get}\\&#10;\\&#10;Percenatge  \ increase=\frac{17000}{122,000}*100\\&#10;\\&#10;\&#10;Percenatge  \ increase=13.93\\

Hence the percentage increase is 13.93.


3 0
4 years ago
Read 2 more answers
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