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Murljashka [212]
3 years ago
8

What is the square root of four

Mathematics
1 answer:
xz_007 [3.2K]3 years ago
3 0

Answer:

It is +2 or since (+2)*(+2 ) gives. If you think that it would be (-2) also then you are wrong because root of a positive rational number is always positive number.

Step-by-step explanation:

Let the square root of four be ‘k’.

Then we have

(4)^1/2=k

(Squaring both sides)

4=(k)^2

=>(k)^2–4=0

=>(k)^2-(2)^2=0

=>[k+2][k-2]=0 {since (a)^2-(b)^2=(a+b)(a-b)}

if product of two numbers is 0 then either of one must be zero.

If k+2=0 then k=-2

If k-2=0 then k=2

From here we got two answers but -2 should be omitted because when we square an equation we add “root extra”which means that when we square an equation one root is added.

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3 would be the answer to that!
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4.5(8-x)+36=102-2.5(3x+24) show step by step how to solve please.
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Expand

simplify 36 - 4.5x + 36 to -4.5x + 72

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add 7.5x to both sides

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subtract 72 from both sides

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3 years ago
- Inessa ran 3 laps in 10 minutes. How long
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Answer: 16 minutes and 40 seconds

Step-by-step explanation:

1.) Divide 10 minutes by 3 laps in order to find out how long it takes her to run a single lap. (it ends up being 3 minutes and 20 seconds per lap)

2.) Multiply this number by 5, you get 16 minutes and 40 seconds.

NOTE: remember that you’re using intervals of 60 (seconds in a minute) rather than intervals of 100.

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Step-by-step explanation:

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3 years ago
What is the equation of the line that passes through the point (4,7) and has a slope of o?
Svetlanka [38]

Answer:

The equation of the line that passes through the point (4,7) and has a slope of 0 will be:

  • y=7

Step-by-step explanation:

As we know the equation of a line in a slope-intercept form of an equation is

y = mx + b

Here,

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  • b is the y-intercept

so

substituting the point (4,7) and slope m=0

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Therefore, the equation of the line that passes through the point (4,7) and has a slope of 0 will be:

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