All categories

3 years ago

Chapter 2 Test, Form 2

Mathematics

2 answers:

Softa [21]3 years ago

8 0

1.) -49

2.) 24

3.) 27

4.) 28

5.) 15

Kamila [148]3 years ago

5 0

1.) -49
2.) 24
3.) 27
4.) -4
5.) 15

You might be interested in

The rate of change of revenue (in dollars per calculator) from the sale of x calculators is R′(x)=(x+1)ln(x+1)R ′ (x)=(x+1)ln(x+

jekas [21]

Answer:

Total revenue = $\frac{169}{2}\ln(13)-\frac{169}{4}$ dollars

Step-by-step explanation:

$R'(x)=(x+1)\ln(x+1)$

Integrate with respect to $x$ .

$R(x)=$ ∫ $(x+1)\ln(x+1)$ dx

Take $x+1=u$

Differentiate with respect to $x$

$dx=du$

So,

$R(x)=$ ∫ $u\ln(u)\,du$

Use integration by parts: ∫f g dx = f∫ g dx-∫(∫g dx)f' dx

Therefore,

$R(x)=$ $\frac{u^2}{2}\ln(u)$ $-$ ∫ $\frac{u^2}{2}\frac{1}{u}\,du$

= $\frac{u^2}{2}\ln(u)$ $-$ ∫ $\frac{u}{2}\,du$

Put $u=x+1$

$R(x)= \frac{(x+1)^2}{2}\ln(x+1)-\frac{(x+1)^2}{4}$

To find total revenue from the sale of the first 12 calculators, put $x=12$

$R(x)= \frac{(12+1)^2}{2}\ln(12+1)-\frac{(12+1)^2}{4}\\\\= \frac{(13)^2}{2}\ln(13)-\frac{(13)^2}{4}\\\\=\frac{169}{2}\ln(13)-\frac{169}{4}$

Total revenue = $\frac{169}{2}\ln(13)-\frac{169}{4}$ dollars

4 0

3 years ago

Solve for the variable <br> -14 = x -7<br> -12x = 60<br> x+11 = -11<br> - x/4 = 2

Maurinko [17]

1) x= -7
2) x= -5
3) x=-22
4) x =8
Not sure about the last one tho
I tried to help :)

6 0

3 years ago

Read 2 more answers

Please help! I’m not sure what order they go in! (7th grade math)

avanturin [10]

Answer:

30: -5, -2, | 2 |, | 3 |, 8

31: -7, -6, | 5 |, | -6 |, 8

32: -12, | 10 |, | -12 |, | -15 |, | -26 |

33: -17, | -11 |, | 20 |, 21, | -34 |

Step-by-step explanation:

The absolute value turns a negative function into a positive one.

Example: | -24 | would become 24

If it is positive, it stays the same.

Example: | 14 | would simple be 14

7 0

3 years ago

Read 2 more answers

Find the domain of 2y-b/y

vredina [299]

(-∞,0) ∪ (0,∞) is your answer, for any other questions please ask!

4 0

3 years ago

A cylinder has a radius of 6 inches and a height of 15 inches. what is the surface area of the cylinder ? express the answer in

Liono4ka [1.6K]

Answer:

252pi (B)

Step-by-step explanation:

Find the area of the bases (2 * pi * r^2)

r = 6, so:

72pi = total area of bases

Find the area of the side (pi * 2 * r * h)

r = 6 and 15 = h, so:

180 pi = area of the side

180pi + 72pi = 252pi (B)

5 0

3 years ago