3 years ago

Write each improper fraction as a mixed number. 15/4

Mathematics

2 answers:

Lana71 [14]3 years ago

8 0

3 3/4 this is the mixede number of 15/4

Vikki [24]3 years ago

4 0

3 3/4 is the mixed number for the fraction 15/4
hope this helps you

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Given the mean 71.4 and sample standard deviation 11.5 what is the z-

Elenna [48]

Answer: 1.18

Step-by-step explanation:

Z = (x - mean) / standard deviation

Z = (85 - 71.4) / 11.5

Z = 13.6 / 11.5 = 1.18

6 0

3 years ago

Find the average rate of change of f ( x ) = 3 x 2 − 9 on the interval [ 2 , b ] . Your answer will be an expression involving b

iVinArrow [24]

Answer:

$m = 3b+6$

Step-by-step explanation:

Given

$f(x)=3x^2 - 9$

Required

The average rate over $[2,b]$

Average rate (m) is calculated using:

$m = \frac{f(b) - f(a)}{b - a}$

Where

$[a,b] = [2,b]$

So, we have:

$m = \frac{f(b) - f(2)}{b - 2}$

Calculate f(b) and f(2)

$f(x)=3x^2 - 9$

$f(b)=3b^2 - 9$

$f(2)=3*2^2 - 9 = 12 - 9 = 3$

So, we have:

$m = \frac{f(b) - f(2)}{b - 2}$

$m = \frac{3b^2 - 9 - 3}{b - 2}$

$m = \frac{3b^2 - 12}{b - 2}$

Expand the numerator

$m = \frac{3b^2 + 6b-6b-12}{b - 2}$

Factorize

$m = \frac{b(3b + 6)-2(3b+6)}{b - 2}$

Factor out 3b + 6

$m = \frac{(b -2)(3b+6)}{b - 2}$

Cancel out b - 2

$m = 3b+6$

4 0

3 years ago

Multiply.<br> (4x-3)(3x+1)<br> Simplify your answer.<br> П<br> ?

Aloiza [94]

Answer:

12x^2 -5x - 3

Step-by-step explanation:

( 4x - 3)( 3x + 1 )

distribute

12x^2 + 4x - 9x - 3

combine like terms

12x^2 - 5x - 3

Hope this helps!!!

6 0

3 years ago

If 5 friends buy a package of 38 balloons, how should they divide them?

Nastasia [14]

All you have to do is divide 38 divided by 5 which = 7 r 3

I hope this helps.

Have a awesome day. :)

7 0

3 years ago

Read 2 more answers

What is the decimal equivalent of the fraction?

RUDIKE [14]

So to find the decimal of the fraction you to divide 7/11
which equals C. 0.636363636363 the 63 goes on forever.

5 0

3 years ago