Please help! What’s the answer to these questions

Answer:

[tex]pg\int\limits^7_7(10-y)2\sqrt{7^2-y^2} \, dy[/tex]

*The last bound is negative 7

Then it equals 15085928 or 1.5E7

Step-by-step explanation:

[tex]x^2+y^2=7^2[/tex]

area = 2xdy

depth = (7+3)-y -> (10-y)

total force = [tex]pg\int\limits^7_7 {(10-y)2x} \, dy[/tex]

Substitute 2x from the first equation as x=[tex]\sqrt{7^2-y^2}[/tex]

total force = [tex]pg\int\limits^7_7 {(10-y)2\sqrt{49-y^2} } \, dy[/tex]

=pg1539.38

=(1,000)(9.8)(1539.38)=1.5E7 N

*Lower bound is -7, can't get the program to allow me to put it as a negative

The hydrostatic force against one side of the plate is an integral 1.5E7 N.

The general equation of a circle is [tex](x-h)^{2} +(y-k)^{2} = r^{2}[/tex]. The coordinate is (0, 0) at the origin, so the equation will become [tex](x)^{2} +(y)^{2} = r^{2}[/tex].

[tex](x)^{2} +(y)^{2} = 7^{2}[/tex]

area of circular plate = 2xdy

depth = (7+3)-y =  (10-y)

The total force = [tex]pg\int\limits^7_7[ {10-y} ]2xdy[/tex]

Substitute 2x from the first equation as x = [tex]\sqrt{7^{2} -y^{2} }[/tex][tex]pg\int\limits^7_7[ {10-y} ]\sqrt{49 -y^{2} }dy[/tex]            

= pg 1539.38

= (1,000)(9.8)(1539.38)

= 1.5E7 N

Thus, The hydrostatic force against one side of the plate is an integral 1.5E7 N.

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Answer:

y=-2x+b

-2=-8+b

6=b

y=-2x+6

so

2x+y=6

Answer:

3 hours

Step-by-step explanation:

285+55+285+55+285+55=1020

or another way

285+55×3= 1020

Answer:

Irrational Number

Step-by-step explanation:

Given

[tex]Number = 1.56432..[/tex]

Required

Determine which set of number it is

The given number is not a natural number, whole number and it is not an integer because it contains decimal point

The given number is not rational because it can not be expressed as a fraction of two whole numbers.

Hence:

The set of the number is irrational

Answer:

A. 1 in. = 22.5 mi

Step-by-step explanation:

Since 22.5 x 10 = 225, we can conclude that this will fit the scale needed. B. is incorrect because it is simply illogical in context with a scale and the question. C. is incorrect since 10 x 0.04 is 0.4, which does not equal 10. D. is incorrect since we need the scale to add up to equal 225 mi, not 22.5.

Hope this helps!

Answer:

10 teachers= 120 students

Step-by-step explanation:

2 teachers= 24 students

divide 24 and 2 which 12

1 teacher= 12 students

multiply 10 and 12 which equals to 120

10 teachers= 120 students.

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Answer: 76

Step-by-step explanation:

47+3= 50

19+7=26

50+26=76

Where's the Bar Diagram?

Hope this Helps!

Answer:

cars weighed the most per item and desks the least

Answer:

I included the graph for you, hope this helps!

Step-by-step explanation:

Answer:

Step-by-step explanation:

23 - 5 = 18 Years Old

Hope this helps! <3

Answer:

18 yeara old

Step-by-step explanation:

let Bob's age be 'x'

5 more than Bob's age means

5+x ...is 23

Therefore, 5+x=23

x= 23-5

18

Bob is 18 years old.

Hope it helped.

Answer:

8x²- x -8

Step-by-step explanation:

The question is not well written. I guess what you mean is:

Subtract -2x^2+4x-1 ( minus 2x squared plus 4x minus 1) from 6x^2+3x-9 (6x squared plus 3x minus 9).

To  subtract -2x^2+4x-1 from 6x^2+3x-9, that is

6x^2+3x-9 - (-2x^2+4x-1). This can be written as

6x²+3x-9 - (-2x²+4x-1)

Now, opening the bracket, we will get

6x²+3x-9 +2x²-4x+1

Then, collecting like terms, we get

6x²+2x²+3x-4x-9+1

6x²+2x² = 8x²

3x-4x = -x

-9+1 = -8

∴6x²+2x²+3x-4x-9+1 becomes

8x²-x -8

The answer is 8x²-x -8.

Simplified form of the polynomial :

8x²- x -8

Given(correct form of question):

Subtract -2x²+4x-1 ( minus 2x squared plus 4x minus 1) from 6x²+3x-9 (6x squared plus 3x minus 9).

Now,

To  subtract -2x²+4x-1 from 6x²+3x-9, that is

6x²+3x-9 - (-2x²+4x-1). This can be written as

6x²+3x-9 - (-2x²+4x-1)

Now, opening the bracket, we will get

6x²+3x-9 +2x²-4x+1

Then, collecting like terms, we get

6x²+2x²+3x-4x-9+1

6x²+2x² = 8x²

3x-4x = -x

-9+1 = -8

∴6x²+2x²+3x-4x-9+1 becomes 8x²-x -8

Thus,

The answer is 8x²-x -8.

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Answer:

18+7=7+18

Step-by-step explanation:

Answer:

3 (if you're supposed to add them)

Step-by-step explanation:

7+5=12

12+(-3)=9

9+(-6)=3

Answer:

I believe the answer is 3

Explanation:

5+(-3)+7+(-6) = 3

Hope this Helps!

Answer:

107/56 miles further on Sunday

Step-by-step explanation:

biked 139/8  saturday

biked 135/7  sunday

which fraction is greater by finding a common denominato 107/56r

Least common Denominator of 7 and 8 is 56

139x 7/8 x 7= 973/56

135x8/7 x  8=1080/56

1080/56 - 973/56 = 107/56

Therefore he rode further on Sunday further by 107/56 miles

Answer:

[tex]x^2+y^2=36100000[/tex]

Step-by-step explanation:

Here it is mentioned that the there are two concentric circles this means that they have the same center.

The center of the circles are the origin [tex](0,0)[/tex].

Radius of the outer circle is

[tex]r=\dfrac{3800}{2}=1900\ \text{m}[/tex]

Equation of a circle

[tex](x-a)^2+(y-a)^2=r^2[/tex]

where

[tex]a\ \text{and}\ b\ \text{are the}\ x\ \text{and}\ y\ \text{coordinates of the center}[/tex]

[tex]r=\text{Radius of the circle}[/tex]

Here the equation will be

[tex](x-0)^2+(y-0)^2=1900^2\\\Rightarrow x^2+y^2=3610000[/tex]

The equation of the outer circle is [tex]x^2+y^2=3610000[/tex]

Answer:

2/3

Step-by-step explanation:

Answer:

2/3

Step-by-step explanation:

formula: y2-y1/x2-x1

-4-0/3-9=

-4/-6=

2/3

Answer:

The coordinates of the point B’ is (2,6)

Step-by-step explanation:

Let us have a case of rotation for 270 counterclockwise first;

So if we had;

(x,y) and we rotate 270 degrees about the origin, we will have (y , -x)

This is the case of the origin.

In cases where we are not rotating around the origin, say a point (a,b)

The result of the rotation will be;

(x,y) Turning to (y - b + a , a - x + b)

In the case of this question;

x = -2, y = 4

a = 1 , b = 3

Substituting these into the rotation equation, we have;

(4-3 + 1 , 1-(-2) + 3)

= (2 , 6)

So the coordinates of the point B’ is (2,6)

Answer:

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

Answer:

Edna = 56.5

Elsa = 57.5

Step-by-step explanation:

Represent Edna age with x; Elsa age will be x + 1

So,

[tex]x + x + 1 = 114[/tex]

[tex]2x + 1 = 114[/tex]

Make 2x the subject

[tex]2x = 114 - 1[/tex]

[tex]2x = 113[/tex]

Solve for x

[tex]x = 113/2[/tex]

[tex]x = 56.5[/tex]

Elsa age is calculated as thus;

[tex]Elsa = x + 1[/tex]

[tex]Elsa = 56.5 + 1[/tex]

[tex]Elsa = 57.5[/tex]

the answer is k=4.6. hope this helps

Answer:

24 feet wide

Step-by-step explanation:

72/18 = 4

80/20 = 4

88/22 = 4

Since there is one common answer between all sizes, you can make a ratio to help or you can use inverse operations.

Inverse operations is easier, so you would divide 96 by 4, and that will equal 24.

Answer:

my life hurts now

Step-by-step explanation:

Answer:

42

Step-by-step explanation:

GET A BOOK U MORON

Answer:7x+28

Step-by-step explanation:

Answer:

7x + 28

Step-by-step explanation:

Line up the columns just like with standard addition.  Keep the x numbers in the same columns and keep the integers in their columns.  It will look like this:

               3x     +     15

PLUS       4x     +     13

              ----------------------

                7x     +     28

Answer:

a) 24

b) f^-1 = [tex]\sqrt{x+1}[/tex]

c) 3

Step-by-step explanation:

Just plug the numbers in for x:

(5)^2 -1 = 24

Switch x and y then solve for y and replace y with f^-1(x):

x = y^2 -1

sqrt(x +1) = y = f^-1(x)

Now plug in 8:

f^-1(x) = sqrt(8 +1)  = 3

5. total time taken = 3hrs

    speed = 30km/hr

total distance travelled = 30 * 3= 90km

6. total time taken = 1.5hrs = 1  1/2 hrs

   speed = 70 miles/hr

  distance travelled in 1/2 hrs = 1/2 * 70 = 35 miles

total distance travelled = 3/2 * 70 = 3 * 35 = 105 miles

Rest of the answer jen will help

Hope it helped u,

pls put thanks and mark as the brainliest

Answer: 3.25

Step-by-step explanation: What I did was Multiply 42.25 by 100 ( To make it easier) and then divide it by 13. After that, I divided the quotient by 100 to get the real answer, which was 3.25

Let me know if I was helpful or not!

Answer:

2.8

Step-by-step explanation:

since 4/5 equals .8 it would just be 0.8 + 2

Answer:

14/5 i think it,s the answer

Step-by-step explanation:

Answer:

47

Step-by-step explanation:

Simplify the following:

-26 + 6 - -67

Hint: | Multiply -1 and -67 together.

-(-67) = 67:

-26 + 6 + 67

Hint: | Evaluate 6 + 67 using long addition.

| 1 |  

| 6 | 7

+ | | 6

| 7 | 3:

73 - 26

Hint: | Subtract 26 from 73.

| 6 | 13

| 7 | 3

- | 2 | 6

| 4 | 7:

Answer: 47

Answer:

14 games

Step-by-step explanation:

  43

 X 5

 -----

$215 - 5 games

$245 - 6 games

$275 - 7 games

$305 - 8 games

$335 - 9 games

$365 - 10 games

$395 - 11 games

$425 - 12 games

$455 - 13 games

$485 - 14 games

Answer:

14 games

Step-by-step explanation: