3 years ago

Which number is irrational

Mathematics

1 answer:

crimeas [40]3 years ago

7 0

Answer: $\sqrt{15}$

Step-by-step explanation:

Square root of 15 is irrational because it is non terminating and non repeating.

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Harvard University accepts 6 students for every 100 applicants. How many students will be accepted in 850 applicants apply for a

LenKa [72]

Answer:

51 students.

Step-by-step explanation:

First you need to establish a rate 6/100+3/50

8*100=800 6*8=48

3/50

850-800=50 3/50

48+3=51

5 0

3 years ago

Read 2 more answers

Do u know whats 103,727,495 in word for and expanded form

Studentka2010 [4]

Answer:

word form: One hundred three million seven hundred twenty seven thousand four hundred and ninety five.

expanded form: 100,000,000+3,000,000+700,000+20,000+7,000+400+90+5.

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2 years ago

What is a whole number between the square root of 27 and the square root of 39

Vinvika [58]

That number would be 6.
Since 5^2 = 25 and 6^2 = 36, we can see that the only possible whole number between sqrt(27) and sqrt(39) has to be 6.

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3 years ago

HELP ON THIS PROBLEM!! Solve the following 0deg< x< 360deg: cos x= cos 2x

blsea [12.9K]

Answer:

$x=0^\circ,120^\circ,240^\circ,360^\circ$

Step-by-step explanation:

Use identities to set the equation up as a quadratic

$\cos x=\cos 2x;\:0^\circ \leq x \leq 360^\circ\\\\\cos x=2\cos^2 x-1\\\\0=2\cos^2 x-\cos x-1$

Make the substitution u=cos(x) and solve the quadratic

$0=2u^2-u-1\\\\0=(2u+1)(u-1)$

$\displaystyle 0=2u+1\\\\0=2\cos x+1\\\\-1=2\cos x\\\\-\frac{1}{2}=\cos x\\\\120^\circ,240^\circ=x$

$0=u-1\\\\0=\cos x-1\\\\1=\cos x\\\\0^\circ,360^\circ=x$

Hence, $x=0^\circ,120^\circ,240^\circ,360^\circ$

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2 years ago

Simplify 3 times 4 minus 8 divided by 2

lisabon 2012 [21]

Answer:

Step-by-step explanation:

3 x 4 = 12 - 8 = 4 ÷ 2 = 2

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3 years ago