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Novay_Z [31]
3 years ago
15

Find the solutions to x^2 = 8

Mathematics
2 answers:
sp2606 [1]3 years ago
8 0

Answer:

The value of x is -2.828 or 2.828

Step-by-step explanation:

In order to eliminate of square of x, you have to square root both sides :

{x}^{2}  = 8

\sqrt{ {x}^{2} }  = ± \sqrt{8}

x =  \sqrt{8}  \\ x = 2 \sqrt{2}  \: or \: 2.828

x =   -  \sqrt{8}  \\ x =  - 2 \sqrt{2}  \: or \:  - 2.828

lbvjy [14]3 years ago
3 0

Answer:

x=2√2 is the answer

Step-by-step explanation:

x²=8

<em>TAKING SQUARE ROOT ON BOTH SIDES</em>

√x²=√8

x=√2×2×2

x=√2²×√2

x=2√2

i hope this will help you

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Answer:

n=3

Step-by-step explanation:

you have 2n+7=6n-5

start with subtracting 2n from both sides giving you 7=4n-5

now take the -5 and add 5 to both sides, giving you 12=4n

now divide both sides by 4, now giving you 3=n

the variable has to be on the left every time you finish your work living with n=3

5 0
4 years ago
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* PLEASE ANSWER PLS &amp; TY *
ICE Princess25 [194]
300 degrees

5/3 x 180

Cancel the common factor of 3

5 x 60

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Convert to a decimal

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8 0
3 years ago
A company in Maryland has developed a device that can be attached to car engines, which it believes will increase the miles per
HACTEHA [7]

Answer:

About 0.72

Step-by-step explanation:

Given the data:

With device : 22.6, 23.4, 28.4, 29, 29.3, 20.0

Without device :26.9, 24.4, 20.8, 20.8, 20.2, 26.0, 28.1, 25.6

Using calculator:

With device data:

Sample size (n1) = 6

Degree of freedom (df1) = 6 - 1 = 5

Mean(m1) = 25.45

Variance (s²1) = 15.631

Without device data:

Sample size (n2) = 8

Degree of freedom (df2) = n - 1 = 7

Mean (m2) = 24.1

Variance (s²2) = 9.54

s²t = ((df1/(df1 + df2)) * s²1) + ((df2/(df1 + df2)) * s²2)

s²t = ((5/(5+7)*15.63) + ((7/(5+7))*9.54)

= ((5/12) * 15.63) + ((7/12) * 9.54) = 12.0775

s²m1 = s²t/n1 = 12.0775/6 = 2.0123

s²m2 = s²t/n2 = 12.0775/8 = 1.511

T - statistic :

Tstat = (m1 - m2)/√(s²m1 + s²m2)

Tstat = (25.45 - 24.10) / √(2.0123 + 1.511)

Tstat= 1.350/√3.5233

Tstat = 1.350 / 1.8770455

Tstat = 0.7192153 = 0.72

8 0
3 years ago
30 points answer asap!!!!!!!!!!!!!!!!!!!!Which expression represents the lateral surface area of the cone?
Alisiya [41]

Answer:

it would be b

7 0
3 years ago
25 POINTS. Radar used microwaved yo check the speed of cars. If a speed of the microwaves is 2 000 000 m/ s and the wavelength i
Virty [35]

Answer:

57971014.49 Hz or 5.79 * 10^7 Hz

Step-by-step explanation:

Given that:

Speed of microwave (v) = 2,000,000 m/s

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Frequency :?

Using the relation :

v = fλ

f = v / λ

f = 2,000,000 / 0.0345

f = 57971014.49 Hz

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3 years ago
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