19) Over the past 4 hours the temperature fell 37.5°F. On average, how much did the temperature fall per hour?​

Answer:

0.282kg/m3

Step-by-step explanation:

density=mass/volume

mass=32.5kg

volume=lxbxh

volume=2.4mx60cmx80cm

convert 60cm and 80cm to m:

60cm=6m

80cm=8m

volume= 2.4mx6mx8m

volume=115.2m3

density=32.5/115.2m3

density=0.28211kg/m3

round to nearest three decimal places:

= 0.282kg/m3

The volume of a cone having the same radius and same height as that of the cylinder is equal to 100 cm³.

Given that:

The volume of a cylinder is 300 cm³.

We assume that,

The radius of the cylinder = radius of the cone = r cm.

Height of cylinder = height of cone = h cm.

We have to find the volume of a cone having the same radius and same height as that of the cylinder.

The formula for the volume of a cylinder is = π x radius² x height

The formula for the volume of a cylinder is = πr²h cm³ = 300 cm³ ..... (1)

We know that,

The formula for the volume of cone = (1/3) x π x (radius)² x h

Volume of cone = (1/3) x π x (radius)² x h

Volume of cone = (1/3) x (πr²h)

Putting the value of πr²h from equation (1).

Volume of cone = (1/3) * 300

Hence, the volume of the cone is equal to 100 cm³.

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Answer:

C

Step-by-step explanation:

(-2x -9y^2) (-4x - 3)

= 8x^2+6x + 36y^2x+27y^2

False, one can tell if a data set is close to symmetric or not by watching a histogram.

             The histogram exhibit a symmetrical distribution of given data. The data is symmetrical if we are able to draw a vertical line at some point in the histogram such that its shape on both sides of the left and the right of the vertical line exactly reflected images to each other. The mean, the median, and the mode are can be taken as examples to prove the symmetricity using histogram for these data.  

         In an altogether symmetrical distribution, the mean and the median are alike. Such as the mode has one mode (unimodal), and the mode is the alike as the mean and median.

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Answer:

Area under the curve f (x) = 38 on interval [88, 132]: 38 132 -3344 (Decimal: 1672)

Step-by-step explanation:

Answer:

Yes, the relation is proportional

Step-by-step explanation:

For a proportional relation, the ratio of X/Y (and thus Y/X) should be constant. You can verify, for examply dividing each Y by the corresponding X:

9 / -3 = -3

6 / -2 = -3

-3 / 1 = -3

-6 / 2 = -3

-9 / 3 = -3

As you can see, the ratio is the same, so the relation is proportional.

Answer:

D

Step-by-step explanation:

Since Δ QTS is isosceles then the base angles are congruent , that is

∠ TQS = ∠ QST = y

∠ QST and ∠ RST are a linear pair and sum to 180° , that is

∠ QST + ∠ RST = 180

y + ∠ RST = 180 ( subtract y from both sides )

∠ RST = 180 - y

the sum of the 3 angles in Δ TRS = 180° , that is

∠ RTS + ∠ TRS + ∠ RST = 180

∠ RTS + x + 180 - y = 180 ( subtract 180 from both sides )

∠ RTS + x - y = 0 ( subtract x - y from both sides )

∠ RTS = y - x

The solution of the mathematical statement is 102.5

From the question, we have the following mathematical statement that can be used in our computation:

"What is -5/2 times -41"

This means that

-5/2 times -41

Express as numbers

So, we have

-5/2 * -41

Divide 5 by 2

So, we have

-2.5 * -41

Evaluate the product

102.5

Hence, the result is 102.5

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The constant, k is $2500 and 7 months of work will be needed to earn $17,500.

According to the question,

We have the following information:

We have a table where months and the salary in dollars is given.

Now, the salary is increasing constantly with number of months.

So, we have the following expression:

9) Amount of dollars is directly proportional to number of months.

Dollars = k*months

2500 = k*1

k = 2500

10) Now, the amount given is $17,500.

So, we have:

k*months = 17,500

Months = 17500/2500

Months = 7

Hence, the constant, k is $2500 and 7 months of work will be needed to earn $17,500.

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Answer:

(-3,5)

Step-by-step explanation:

we just plug the solutions in the equation to see if it’s true

y<x+12

12<-4+12

12<8

Not true 12 is not less than 8

9<-7+12

9<5
not true 5 is not greater than 9

8<-5+12

8<7

Not true 8 is not less than 7

5<-3+12

5<9
true 5 is less than 9

Hopes this helps please mark brainliest

Answer:

<8, <1, <4 are all 96

<6,<7,<3, <2 are all 84

Step-by-step explanation:

Answer:

-6

Step-by-step explanation:

-7 x -1 = 7

7 - 13 = -6

Answer:

The answer has to be 8.999

Answer:

P(x) = $31x - $840

Step-by-step explanation:

Let x be the number of bicycles.  The total cost for purchasing and repairing the bikes is $47x, plus a one-time purchase of $840 for a workshop and tools.  Total cost, C is therefore:

  C(x) = $47x + $840

We learn Aidan sells the bikes for $75 each.  Total revenue, R, is:

  R(x) = $75x

Profit, P, would be the difference of revenue, R, and costs, C:

  P(x) = R(x) - C(x) or $75x -($47x + $840)

    P(x) = $75x -$47x - $840

    P(x) = $31x - $840

P(x) represents the total profit for x bicycles.

See the attached graph.  Note the key features of the graph are the breakeven (27 bikes) and the initial investment (-$840).  We can find the breakeven point by looking for the value of x when the profits are $0.  A more accurate determination can be found by solving the equation we developed for the case in which P(x) = $0:

P(x) = $31x - $840

0 = $31x - $840    for P(x) = 0 (breakeven)

$31x = $840

x = 27.1 units.  We need to round to 27 units since 0.1 of a bicycle makes no sense in this context.

The angle of half past eight between the hour and minute hands of a clock is 255°.

Given that,

We have to find look for the smaller angles half past eight between the hour and minute hands of a clock.

We know that,

The clock is in circle.

A clock has 12 different parts. Between any two divisions, there is a 30° angle. Each division is then divided into 5 equal pieces, each of which is divided by an angle of 60° and equals 1 minute.

We know the total angle of the circle is 360°.

So, 12 hours is 360°.

Then 1 hours is

1 hour= 360/12=30°

So, 1 hour is 30°

60mins=1 hour

60 mins = 30°

1 min =30/60

1 min=1/2

So,

8 hour and 30 min

(8× 1 hour)+( 30×1 min)

(8×30)+(30×1/2)

240+15

255°

Therefore, The angle of half past eight between the hour and minute hands of a clock is 255°.

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Step-by-step explanation:

Please refer to photo for drawing

n/16 lies between 4/16 and 8/16

So, n can be 5,6,7

Answer:

5, 6 , 7

Step-by-step explanation:

Change 1/4 and 1/2 to the values they would be if their denominator was 16

1/4 will become 4/16

1/2 will become 8/16

the values between these are 5/16, 6/16, 7/16

n can be 5, 6 or 7

Answer:

  a.  9.56 × 10^3

Step-by-step explanation:

You want the sum (3.45 × 10^3)+ (6.11 ×10^3).

Distributive property

The distributive property works when adding numbers in scientific notation:

  (3.45 × 10^3)+ (6.11 × 10^3) = (3.45 +6.11) × 10^3 = 9.56 × 10^3

O Carys gets to Norwich station at 0750. To know how long will she have to wait for a train directly to Colchester.

Lets assume the values to be

a = 0848

b = 1 hour 2 minutes

c = 5 minutes

And let us look into it in detail as below

a = The first train arrive in London is 0848

b = Norwich to Colchester gets the trains in 1 hour 2 minutes

c = Carys gets to Norwich at 0750

So she need to wait for 5 minutes in a a train to get directly to Colchester.

Hence the answer is 5 minutes.

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Answer:x

2

−

2

x

+

1

=

x

2

−

2

x

+

1

2

=

(

x

−

1

)

2

A perfect square trinomial is the square of a binomial, so will take the form:

a

2

+

2

a

b

+

b

2

since

(

a

+

b

)

2

=

a

2

+

2

a

b

+

b

2

So a perfect square trinomial satisfies the following conditions:

(1) Two of the terms are squares.

(2) The other term is twice the product of the square roots (positive or negative) of the other two terms.

If the two square terms are

a

2

and

b

2

then the trinomial is either

(

a

+

b

)

2

or

(

a

−

b

)

2

depending on the sign of the third term.

Answer:

Yes, he is correct

Step-by-step explanation:

100% : x

62%   : 19

Cross multiply

19*100% = 62%x

19 = 0.62x

19/0.62 = x

x = 30.645

Rounds up to 31

Answer:

Series calculator is a free online tool that gives the summation value of the given function for the given limits.

please make my answer as brainelist

Answer: c = 30

Step-by-step explanation:

[tex]12=\frac{c-6}{2}\\ \\12(2)=c-6\\\\24=c-6\\\\c=24+6=30[/tex]

Inequality: 23x + $8 ≤ $110

Inequality:

$110 = Amount of money they have

$8 = Parking Cost

$23 = Cost of tickets per person

23x + $8 ≤ $110

23x=$110-8

23x=$102

In mathematics, a courting among expressions or values that aren't the same as every other is referred to as 'inequality. This term is used to examine the significance, wide variety, and intensity of two values or expressions. Equations and inequalities are both mathematical sentences fashioned by using referring to two expressions for every difference. In an equation, the two expressions are deemed equal's shown with the aid of the symbol =.

whereas in inequality, the two expressions aren't necessarily the same that's indicated by means of the symbols: >, <, ≤ or ≥. Inequality is critical to poverty due to the fact the relative role of people or families in society is taken into consideration as a crucial aspect of their welfare.

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The first quadrant that lies between the circle x² + y² =4 is 1.09587

The graph of x² +y² = 4 is a circle of radius 2, centered at (0, 0). In polar coordinates, this equation becomes simply r = 0.

The second equation requires a bit more work. To convert it to a polar equation, we

substitute, r cos θ for x and r sin θ for y:

r²cos ²θ + r²sin ²θ

   = 2r cos Ф

⇒r² = 2r cos θ

⇒r = 2 cos θ

This is the polar equation for a circle of radius 1, centered at the point (x, y) = (1, 0). (This can be seen directly from the original equation by completing the square, which results in the equation (x − 1)²+ y² = 1.)

To describe the region between the circles in polar coordinates, we can let θ range from 0 to π/2. Our values for r should range from the smaller circle to the larger one

Recalling again that x = r cos θ and dA = rdrdθ, our integral becomes

∫ ∫ₐ  x DA  = 8/3 - π/2

We can get a rough check of this answer as follows. The area of the region D is easily computed to be π/2. The average value of the function x in the region is somewhat less than 1, since D is thicker on the left. Doing these sorts of visual estimates can be very tricky, but let’s say the average value of x in D is about 0.70. Thus

∫∫ₐ x dA ∼=π/2· 0.70 ∼= 1.09956

Since 8/3 − π/ 2∼= 1.09587, this estimate agrees quite well with our answer.

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Answer:

Step-by-step explanation:

EQUATION: F = km / d²100 = k(8) / (5)²100 = k 8 / 25100 ÷ 8 / 25 = k 8 / 25 ÷ 8 / 25625 / 2 = kF = (625 / 2)(2) / (15)²F = 625 / 225F = 25 / 9

The values of the variables x in the  equations are;

An equation is a mathematical statement that connects two mathematical expression with an equals sign.

x + 9 = 13

Subtracting 9 from both sides of the equation, we get;

x = 13 - 9 = 4

3•x = 12

Dividing both sides of the equation by 3, we get;

x = 12 ÷ 3

x + 5 - 9 = 0

Subtracting (5 - 9) from both sides of the equation, we get;

x = 9 - 5 = 4

2•x + 5 = 17

Subtracting 5 from both sides of the equation, we get;

2•x  = 17 - 5 = 12

2•x = 12

Dividing both sides of the equation by 2, we get;

x = 12 ÷ 2 = 6

5•x - 3 = 17

Adding 3 to both sides of the equation, we get;

5•x = 17 + 3 = 20

5•x = 20

Dividing both sides of the equation by 5, we get;

x = 20 ÷ 5 = 4

x - 3 = 1

Adding 3 to both sides of the equation, we get;

x = 1 + 3

7•x = 35

Dividing both sides of the equation by 7, we get;

x = 35 ÷ 7 = 5

[tex]\frac{4\cdot x}{4} = 4 [/tex]

Multiplying both sides of the equation by 4 and dividing the result by 4, we get;

x = 4 × 4 ÷ 4 = 4

3•(x + 4) = 15

Dividing both sides of the equation by 3, we get;

x + 4 = 15 ÷ 3 = 5

x + 4 = 5

Subtracting 4 from both sides of the equation, we get;

x = 5 - 4 = 1

8 + x - 5 = 7

Adding 5 and subtracting 8 from both sides of the equation, we get;

x = 7 + 5 - 8 = 4

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