Ask question

Ask question

All categories

3 years ago

7

the 25 members of the reading club are buying a book to discuss at the next meeting but Club leader got a special price the book

will cost $8.14 for each person how much will the 25 books cost

1 answer:

Sever21 [200]3 years ago

6 0

25*8.14=?

Multiply the cost of the book per person ($8.14) by the number of people (25).

You might be interested in

Please help me<br> What is the area of the orange figure? *

g100num [7]

Answer:

it looks like a parallelogram

so,

23*15=345

3 0

3 years ago

Read 2 more answers

The quotient of y and 5 is equal to 27

Ostrovityanka [42]

It would be 27 divided by 5 which would be 5.4, so the answer would be y=5.4

7 0

3 years ago

What is the value of cos (tan^-1 1)

laila [671]

Hope this helps you!

6 0

2 years ago

Read 2 more answers

I ate 4/9 of a ceral box how much ceral do i have left in the box

Solnce55 [7]

Answer:

5/9 of the cereal box.

Hope this helped! :)

7 0

2 years ago

Read 2 more answers

____ [38]

Answer:

Please check the explanation.

Step-by-step explanation:

Given

f(x) = 3x + x³

Taking differentiate

$\frac{d}{dx}\left(3x+x^3\right)$

$\mathrm{Apply\:the\:Sum/Difference\:Rule}:\quad \left(f\pm g\right)'=f\:'\pm g'$

$=\frac{d}{dx}\left(3x\right)+\frac{d}{dx}\left(x^3\right)$

solving

$\frac{d}{dx}\left(3x\right)$

$\mathrm{Take\:the\:constant\:out}:\quad \left(a\cdot f\right)'=a\cdot f\:'$

$=3\frac{d}{dx}\left(x\right)$

$\mathrm{Apply\:the\:common\:derivative}:\quad \frac{d}{dx}\left(x\right)=1$

$=3\cdot \:1$

$=3$

now solving

$\frac{d}{dx}\left(x^3\right)$

$\mathrm{Apply\:the\:Power\:Rule}:\quad \frac{d}{dx}\left(x^a\right)=a\cdot x^{a-1}$

$=3x^{3-1}$

$=3x^2$

Thus, the expression becomes

$\frac{d}{dx}\left(3x+x^3\right)=\frac{d}{dx}\left(3x\right)+\frac{d}{dx}\left(x^3\right)$

$=3+3x^2$

Thus,

f'(x) = 3 + 3x²

Given that f'(x) = 15

substituting the value f'(x) = 15 in f'(x) = 3 + 3x²

f'(x) = 3 + 3x²

15 = 3 + 3x²

switch sides

3 + 3x² = 15

3x² = 15-3

3x² = 12

Divide both sides by 3

x² = 4

$\mathrm{For\:}x^2=f\left(a\right)\mathrm{\:the\:solutions\:are\:}x=\sqrt{f\left(a\right)},\:\:-\sqrt{f\left(a\right)}$

$x=\sqrt{4},\:x=-\sqrt{4}$

$x=2,\:x=-2$

Thus, the value of x will be:

$x=2,\:x=-2$

5 0

2 years ago