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Fed [463]
3 years ago
6

How do you verify factoring is correct?

Mathematics
1 answer:
Ivahew [28]3 years ago
5 0
Multiply the factors together. You should get the original expression.

For example, if we are to factor
2x^2 + 4x
we would factor as
2x(x + 2).
Check this by multiplying back in
2x*x + 2x*2 = 2x^2 + 4x
which is what we started with, so we know we are correct.
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What value of c makes x2 6x c a perfect square trinomial? c = If x2 6x c = (x d)2, then d =.
Mariana [72]

\qquad \textit{perfect square trinomial} \\\\ (a\pm b)^2\implies a^2\pm \stackrel{\stackrel{\text{\small 2}\cdot \sqrt{\textit{\small a}^2}\cdot \sqrt{\textit{\small b}^2}}{\downarrow }}{2ab} + b^2 \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ x^2 \pm \stackrel{\stackrel{2\sqrt{x^2}\sqrt{c^2}}{\downarrow }}{6x} +c^2~\hspace{10em}6x=2\sqrt{x^2}\sqrt{c^2}\implies 6x=2xc \\\\\\ \cfrac{6x}{2x}=c\implies 3=c\implies 9=c^2~\hfill \boxed{(x\pm 3)^2}

3 0
2 years ago
Four students found the mean of the data set 26, 31, 39, 30, 16, 16, 18, 38. which student found the correct mean? ashrita’s wor
balu736 [363]

In calculating the mean of this data set  Ashrita did the best job.

The  Mean of the data set is the most commonly used measures of central tendency.

It means the average value of the data set.

one doesn't have to arrange the data in order  for finding it.

<h3>What is the meaning of mean?</h3>

The data set value  takes is to add them all together and divide that by the number of the data.

It can be written as

,(x_1 + x_2 + x_3 + ..... + x_n) / n

Where x_1 , x_2 , x_3 , ..... ,x_nare the values in the data set

Therefore we can conclude that Ashrita did the best job in calculating the mean of this data set.

To learn more about the mean visit:

brainly.com/question/968894

6 0
2 years ago
Ratios:Question 4
Valentin [98]

Answer:

75 boys

Step-by-step explanation:

Formula-Girls:Boys=Girls:Boys

5:6=_:90

90×5=450

450÷6=75

4 0
3 years ago
Maura runs 5 miles in 1.25 hours.How many miles could she run in 5 hours?<br><br> I NEED HELP!!
Arturiano [62]

Answer:

15

Step-by-step explanation:

4 0
3 years ago
7x + y = 7<br> y = [ ? ]x+ []
otez555 [7]
Y=-7x+7

hope this helped!
6 0
3 years ago
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