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Serggg [28]
3 years ago
15

A student said that x = 4 was not a solution to the question 3(x -6) = -8

Mathematics
1 answer:
Morgarella [4.7K]3 years ago
6 0

Answer:

Step-by-step explanation:

3 (4 -6) = -8 is correct.  The next step is to combine 4 and -6, obtaining

3(-2)

and this 3(-2) should equal -6, which is not the same as -8.

3(4 - 6) = 12 - 18, which differs from the student's solution.  This is the reason for the wrong answer.

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How do you write this equation x+5=2(7+x)
True [87]

Answer:

x=-9

Step-by-step explanation:

x+5=2(7+x)

x+5=14+2x

x-2x=14-5

-1x=9

x=-9

3 0
3 years ago
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Select the solutions of the equation. <br> 2x2-3x-5=0
meriva

Using the Quadratic formula

your answer would be A and C

5 0
3 years ago
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Which of the following is the surface area of the right cylinder below?
yarga [219]

Answer:

if it is TSA- 396 or 395.64

if it is CSA- 88 or 87.92

Step-by-step explanation:

r=7

h=2

TSA= 2 pi r(r+h)

=2*22/7*7*9= 396

<em>CSA</em>= 2 pi r h

2*22/7*7*2=88

when you use pi as 3.14 instead of 22/7 you get the answer with the decimal symbol.. in such case the TSA would be 395.64 and CSA would be 87.92

6 0
4 years ago
Read 2 more answers
I need help on answering this question
liubo4ka [24]

Answer:

<h2>The answer is 72°</h2>

Step-by-step explanation:

Since < RQS = < QLK and < RQS = x

< QLK is also x

< QLK and < KLM lie on a straight line

Angles on a straight line add up to 180°

To find x add < QLK and < KLM and equate them to 180°

That's

< QLK + < KLM = 180°

x + x - 36 = 180

2x = 180 - 36

2x = 144

Divide both sides by 2

We have the final answer as

<h3>x = 72°</h3>

Hope this helps you

7 0
3 years ago
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JulsSmile [24]
<span> Let x be the smaller number.
Then 3x is the larger number.
We also know that the smaller added to the larger is 52, or:
x + 3x = 52
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x = 13
Therefore the smaller is 13, the larger is 3(13)=39. </span>
3 0
3 years ago
Read 2 more answers
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