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mash [69]
3 years ago
15

4. Explain and correct the error made by a student who simplified this expression.

Mathematics
1 answer:
Fiesta28 [93]3 years ago
3 0

Answer:

I notice that the first equation has a 7x, term and the second equation has a -7x term. These terms will cancel if we add the equations together—that is, we'll eliminate the the x terms:

Step-by-step explanation:

2y+7x= -5 + 5y-7x=12

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The ratio of output work to imput work expressed as the percent is what of the machine
Radda [10]

Answer:

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5 0
3 years ago
Give all possible names for each angle shown.<br><br>Calculation Tip: In angle ABC, B is the vertex.
Ivahew [28]

There are three possible answers:

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===========================================

Explanation:

The idea is that the vertex of the angle is always in the middle of the three letter sequence. You can start with either side which is why ZXY is the same as YXZ. As long as X is in the middle, we're talking about the same angle. Because there are only three points here, and no other points to cause confusion, this means that "angle YXZ" can be shortened to "angle X" to make things easier.

5 0
3 years ago
If f(n)=f(n-1)+8 and f(1)=7, what is f(50)
Marina CMI [18]
f(n)=f(n-1)+8=f(n-2)+2\times8=f(n-3)+3\times8=\cdots=f(1)+(n-1)\times8

Since f(1)=7, you have

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4 0
3 years ago
1<br> What is the solution to the equation 4<br> 1 7 1<br> 8 8*3*?<br> X=-5<br> X=-4<br> X=4<br> x=5
siniylev [52]

Answer:

im sorry

Step-by-step explanation:

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6 0
3 years ago
Devaughn’s age is three times Sydney’s age. The sum of their ages is 44. What is Sydney’s age?
Ivanshal [37]
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5 0
3 years ago
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