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2 years ago

K² = 76What is the answer?

Mathematics

2 answers:

Simora [160]2 years ago

6 0

Answer:

± 8.7178 or ± the square root of 19

Step-by-step explanation:

Solve : k2-76 = 0

Add 76 to both sides of the equation :

k2 = 76

When two things are equal, their square roots are equal. Taking the square root of the two sides of the equation we get:

k = ± √ 76

Can √ 76 be simplified ?

Yes! The prime factorization of 76 is

2•2•19

To be able to remove something from under the radical, there have to be 2 instances of it (because we are taking a square i.e. second root).

√ 76 = √ 2•2•19 =

± 2 • √ 19

The equation has two real solutions

These solutions are k = 2 • ± √19 = ± 8.7178

Dmitry_Shevchenko [17]2 years ago

3 0

Answer:

k = 2 √ 19 , − 2 √ 19

Step-by-step explanation:

Take the root of both sides and solve.

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Please help! what is y+7=-1/7(x+4) in slope intercept form?

Stells [14]

We know that
the equation of a line in <span>slope intercept form is--------------> y=mx+b
where
m-----------> is the slope
b-----------> is the y-intercept point when x=0

</span><span>y+7=-1/7(x+4)---------> y+7=(-1/7)x-4/7
</span>y+7=(-1/7)x-4/7------> y=(-1/7)x-4/7-7------> y=(-1/7)x-(53/7)

the answer is
y=(-1/7)x-(53/7)-------------> this is the equation of a line in slope intercept form
m=(-1/7)=-0.14
b=(-53/7)=-7.57
y=-0.14x-7.57

see the attached figure

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2 years ago

Find the x and y intercept for f(x)=x^2-3x-40

Dahasolnce [82]

To find the y-intercept, simply set the value of x equal to 0, and solve for y, or f(x).

f(x) = 0^2 - 3(0) - 40

f(x) = -40

<h3>The y-intercept is -40.</h3>

Because this is a 2nd degree polynomial, we cannot find the x-intercepts in one step, and must instead use one of a few different methods.

In this case, we're going to use the quadratic formula:

$\frac{-b +/- \sqrt{b^2 - 4ac} }{2a}$

Plug in the values.

3 +/- √(-3^2 + 160) / 2

3 +/- √169 / 2

3 +/- 13 / 2

(3 + 13) / 2 = 16 / 2 = 8

(3 - 13) = -10 / 2 = -5

<h3>The x intercepts are 8, and -5.</h3>

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3 years ago

If Sasha can run 720 yards in 4 minutes, how many feet can she run in 15 seconds?

Vika [28.1K]

Okay so you're trying to find the unit rate of 720yds/4min. If you divide 720 by 4 you will have the unit rate as 180yds/1 min or 60 sec then if you divide 180 and 60 by 4 again you will get the answer of 45yds/15sec.

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3 years ago

Question 4

laiz [17]

Answer:

I just solved a question similar to this

Let's understand it

It's saying she got 660 or it is that her weekly pay is 660

So now let weekly pay which is P be 660

Hence the formulae is given

It's 480 + 18 (h – 30) = 660

Now its just boring calculation

If you mark it brainleist I will do the calculation for you wink wink

Never mind

480 + 18 (h – 30) = 660

18 (h – 30) = 660-480

18 (h – 30) = 120

(h – 30) = 120/18

(h – 30) = 6.6

h = 6.6+30

h= 36.6

So dam the Judy lady worked for 36.6 hours

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2 years ago

Mario started his homework at 3:30 he finished 25 minutes later what time did he finish his homework

Katarina [22]

Answer:3.55

Step-by-step explanation:

you add the time dude

8 0

1 year ago

K² = 76What is the answer?​

K² = 76What is the answer?