Simplify: –3(y 2)2 – 5 6y What is the simplified product in standard form? y2 y.

Answer:

-2 -7

0   -1

1     2

3    8

Step-by-step explanation:

The disk method will only involve a single integral. I've attached a sketch of the bounded region (in red) and one such disk made by revolving it around the y-axis.

Such a disk has radius x = 1/y and height/thickness ∆y, so that the volume of one such disk is

π (radius) (height) = π (1/y)² ∆y = π/y² ∆y

and the volume of a stack of n such disks is

[tex]\displaystyle V_n = \sum_{i=1}^n \pi {y_i}^2 \Delta y[/tex]

where [tex]y_i[/tex] is a point sampled from the interval [1, 5].

As we refine the solid by adding increasingly more, increasingly thinner disks, so that ∆y converges to 0, the sum converges to a definite integral that gives the exact volume V,

[tex]\displaystyle V = \lim_{n\to\infty} V_n = \int_1^5 \frac{\pi}{y^2} \, dy[/tex]

[tex]V = -\dfrac\pi y\bigg|_{y=1}^{y=5} = \boxed{\dfrac{4\pi}5}[/tex]

x= 5/3

go on chrome it'll show you

It would take 220 minutes for Angela's and Benjamin's monthly bills be the same

A linear equation is in the form:

y = mx + b

where y, x are variables, m is the slope of the line and b is the y intercept.

Let y represent the cost after x minutes, hence:

For angela:

y = 0.15x + 49

The y intercept is $49 and the rate of change is $0.15 per minute

For Benjamin:

[tex]y-y_1=\frac{y_2-y_1}{x_2-x_1} (x-x_1)\\\\y-60=\frac{80-60}{200-0} (x-0)\\\\y=0.1x+60[/tex]

The y intercept is $60 and the rate of change is $0.10 per minute

For 200 minutes:

Angela: y = 0.15(200) + 49 = $79

Benjamin: y = 0.10(200) + 60 = $80

To be the same:

0.15x + 49 = 0.1x + 60

x = 220 minutes

It would take 220 minutes for Angela's and Benjamin's monthly bills be the same

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Answer:

whats the question or is this a joke

Answer:

45

Step-by-step explanation:

Answer:

chicken= $10.20

beef= $12.90

the difference between them is $2.70

Step-by-step explanation:

so you do 3.40 *3 and get 10.20.

then 4.30*3 and get 12.90

then 12.90- 10.20= $2.70

Answer:

1 pound of chicken costs=$3.40

3 pounds of chicken costs=3×3.40

=$10.2

1 pound of beef costs=4.30

3 pounds of beef costs=3×4.30

=$12.9

Now,

How much more does the beef cost?

=12.9--10.2

=$2.70

hope it helps you :)

Answer:

3

Step-by-step explanation:

Answer:

6:1

Step-by-step explanation:

1.8:0.3

each times by 10

18:3

each divided by 3

6:1

Answer:

I think it could be 88-?

Answer:

it's 88

Step-by-step explanation:

u multiply 11*8 and u get 88 in. squared

pls mark as brainliest ;)

Answer:

the answer is c

Step-by-step explanation:

Answer:

c

Step-by-step explanation:

5/6-7/12=3/12

(60-42)/72=18/72

after simplifyingg you will get 3/12

Jessica's annual salary is $68571.43.

Data;

This is the ratio of a number to the entire value and multiplied by 100

The percentage set aside for housing is given as 28% which is $1600.

Let find 28% of x which is equal to 1600

[tex]\frac{28}{100} = \frac{1600}{x}[/tex]

cross multiply both sides and solve for x

[tex]\frac{28}{100} = \frac{1600}{x}\\ 28*x = 100*1600\\28x = 160000\\[/tex]

Divide both sides by the coefficient of x

[tex]\frac{28x}{28} = \frac{160000}{28}\\ x = 5714.28[/tex]

Her monthly income is $5714.28.

Let's multiply this by 12 (months in a year) to determine her gross monthly income.

[tex]5714.28*12 = 68571.43[/tex]

From the above calculations, Jessica's annual salary is $68571.43.

Learn more on percentage here;

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Answer:

2x^2+8x+15

Step-by-step explanation:

[tex] {2(x + 1)}^{2} + 4(x + 1) + 7[/tex]

[tex]2({x}^{2} + 2x + 1) + 4x + 4 + 7[/tex]

[tex]2 {x}^{2} + 4x + 2 + 4x + 13[/tex]

[tex]2 {x}^{2} + 8x + 15[/tex]

Answer:

Draw the top and bottom line segments equal length and parallel. The perpendicular bisector of the lines are gonna be one line of symmetry. Next, draw the horizontal line of symmetry halfway between those. Pick two points on the horizontal line of symmetry that are symmetrical about the vertical line of symmetry. Connect those points to the ends of the top and bottom segments.

Step-by-step explanation:

(Images for more context)

Answer:

n=35; q=33 coins.

Step-by-step explanation:

1) if number of nickles is 'n' and the quaters is 'q' then it is possible to write:

n+q=68 - 'she counted 68 coins...' - the 1st equation of system;

0.25q+0.05n=10 - '10$ in it' - the 2d equation of the system.

2) it is possible to make up and solve the next system of two equations:

[tex]\left \{ {{q+n=68} \atop {0.25q+0.05n=10}} \right. \ => \ \left \{ {{q=33} \atop {n=35}} \right. .[/tex]

I'm not sure about questions 7-10 tho, very sorry

Step-by-step explanation:

11) 5/7

12) 1/4

13) 7/10

14) 3/4

15) 2/9

16) 2/5

17) 13/30

18) 27/50

19) 5/16

20) 4/15

21) 1/24

22) 7/12

23) 1/20

24) 8/15

25) 11/45

It would take about 40 seconds for the temperature to reach 70°C and 44 second to reach 74°C.

A linear equation is in the form:

y = mx + b

where y, x are variables, m is the slope of the line and b is the y intercept.

Let y represent the temperature of the metal bar after x seconds, hence:

Since the metal bar has an initial temperature of 30°C, hence:

b = 30, also m = 1°C (increase), The equation becomes:

y = 1(x) + 30 = x + 30

To reach 70°C:

70 = x + 30

x = 40 seconds

To reach 74°C:

74 = x + 30

x = 44 seconds

It would take about 40 seconds for the temperature to reach 70°C and 44 second to reach 74°C.

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Answer:

25 , 17

Step-by-step explanation:

Let the unknown two numbers be x & y.

According to the question,

Sum of 2 numbers is 42.

x + y = 42  ⇒ ( 1 )

Their difference is 8.

x - y = 8 ⇒ ( 2 )

First let us find the value of x.

( 1 ) + ( 2 )

x + y + x - y = 42 + 8

2x = 50

Divide both sides by 2.

x = 25

And now let us find the value of y.

x + y = 42

25 + y = 42

y = 42 - 25

y = 17

Therefore, the two numbers are 25 , 17

Hope this helps you :-)

Let me know if you have any other questions :-)

Answer:

[tex]let \: the \: numbers \: be \: x \: and \: y \\ x + y = 42....(1) \\ x - y = 8....(2) \\ now \\ x + y = 42 \\ x = 42 - y \\ again \\ x - y = 8 \\ x = 8 + y \\ putting \: the \: value \: of(x) \\ \\ 42 - y = 8 + y \\ 2y = 42 - 8 \\ 2y = 34 \\ y = 34 \div 2 \\ y = 17 \\ putting \: the \: value \: in \: equation \: (1) \\ x + y = 42 \\ x = 42 - 17 \\ x = 25[/tex]

x=25 and y=17

hope it helps.

stay safe healthy and happy.

Answer:

After the reflection:

U: (5,2)

V: (3,1)

W: (3,-3)

Z: (5,-6)

Step-by-step explanation:

To reflect over the x axis, you need to move the point left or right across the x axis (in this case, right) an equal amount of times. Ex: -5, you would move 10 to the right, or 5 to get to 0, then another 5 to equal it out

Answer:

2/21+6/7 = 20/21

Step-by-step explanation:

2/21+6/7

=2/21+(6*3/7*3)

=2/21+18/21

=20/21

Hope this helps! Comment any questions <3

Answer:

20/21

Step-by-step explanation:

2/21 + 6/7

Get a common denominator of 21

2/21  + 6/7 *3/3

2/21 + 18/21

20/21

Answer:

true

The height of Mount Everest is times the height of a waterfall.

Answer:

yeah they are equivalent

Step-by-step explanation:

[tex]\\ \tt\longmapsto (-1)(-x)[/tex]

[tex]\\ \tt\longmapsto x[/tex]

Yes equal

Note that

Answer:

B

Step-by-step explanation:

There are 1.5 revolution in one second.

What is relation between minute and seconds?

The relation between minute and seconds is;

1 minute = 60 seconds

A windmill makes 90 revolutions in one minute.

Now, In one minutes number of revolution = 90

Since, 1 minute = 60 seconds

Hence, In 60 second number of revolution = 90

In 1 second number of revolution = 90/60 = 1.5

So, There are 1.5 revolution in one second.

Therefore, There are 1.5 revolution in one second.

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Answer:

5000+500+10+3=5500+13=5513

Step-by-step explanation:

Answer:

5.515x10³

Step-by-step explanation:

first we abb them together and we get 5513

Answer:

15 pencils

Step-by-step explanation:

total pencils=225x3=675 pencils

boxes=675÷20=33r15

therefore the answer is 15 pencils

-5+(-4)

-5-4

-9

Therefore, -9 is the correct answer