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nlexa [21]
3 years ago
5

Which line shows the first error in the solution?

Mathematics
1 answer:
Arlecino [84]3 years ago
3 0
Error
<span>6 x = - 2 (5)
should be

</span><span>2 x = - 18 (5)

answer
</span><span>D. 
Line 5</span>
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What is:<br> <img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B4x%5E%7B2%7D%20-20x%2B25%20" id="TexFormula1" title=" \sqrt{4x^{2} -
Firdavs [7]

We are given :

\sqrt{4x^{2}-20x+25}

Step 1: factor the part inside square root

The function given inside square root is of quadratic form.

So let us try to factorise it using AC method.

Here A*C = 4*25 = 100

so we have to find factors of 100 that add up to give -20.

the two factors are -10 and -10.

Rewriting the function :

4x^{2} -20x+25

=4x^{2} -10x-10x+25

=2x(2x-5) - 5(2x-5)

=(2x-5)^{2}

Step 2:

Now we take square root of the factorised form

\sqrt{(2x-5)^2}

= 2x-5

Answer : (2x-5)

3 0
3 years ago
Two groups of bikers leave the same camp heading in different directions. Each group travels 4 miles, then changes direction and
devlian [24]

Group B is farther from camp.

7 0
3 years ago
HELP PLEASE ASAP..........
Usimov [2.4K]
Volume = l x w x h
180 = l (5 x 4)
180 = 20 l
6 = l

That means that the couch will fit, because the length of the van is 6 ft, which is also the length of the couch.
6 0
3 years ago
There is a bag filled with 5 blue and 4 red marbles.
PtichkaEL [24]

Answer:

<h2>8/9</h2>

Step-by-step explanation:

9 in total     4 blue

4/9 x 2

8/9

5 0
2 years ago
Please help me solve 3x + 4y =15 and 3x - y = 30 it is for Algebra I
Makovka662 [10]

Answer:

Step-by-step explanation:

Given the simultaneous equation

3x+4y=15. Equation 1

3x-y=30. Equation 2

Using elimination method

Sutract equation 2 from 1

Then, will have

3x-3x+4y--y=15-50. -×-=+

4y+y=-15

5y=-15

Divide Both sides by 5

y=-15/5

y=-3

From equation 2

3x-y=30

3x--3=30

3x+3=30

3x=30-3

3x=27

Divide both side by 3

x=27/3

x=9

Then, x=9 and y=-3

7 0
3 years ago
Read 2 more answers
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