with show work. trigonometry

Answer:

Step-by-step explanation:

Exponents are powers or indices. An exponential expression consists of two parts, namely the base, denoted as b and the exponent, denoted as n. The general form of an exponential expression is b n.

How to Subtract Exponents?

The operation of subtracting exponents is quite easy if you have a good understanding of exponents. In this article, you will learn the rules and how to apply them when you need to subtract with exponents.

But before we can embark on subtracting with exponents, let us remind ourselves some of the basic terms about exponents.What is an exponent?

Well, an exponent or power denotes the number of times a number is repeatedly multiplied by itself. For example, when we encounter a number written as, 53, it simply implies that 5 is multiplied by itself three times. In other words, 53 = 5 x 5 x 5 = 125The same format of writing exponents applies with variables.  Variables are represented by letters and symbols. For instance, when x is multiplied repeated by itself 3 times, then we write this as; x3. Variables are usually accompanied by coefficients. A coefficient is therefore an integer that is multiplied by variable.

For instance, in 2x3, the coefficient is the number 2 and x is the variable. When a variable has no number before it, the coefficient is always 1. This is also true when a number has no exponent. The coefficient of 1 is normally negligible, and therefore cannot be written with a variable.

Subtraction of exponents really does not involve any a rule. If a number is raised to a power. You simply compute the result and then perform the normal subtraction. If both the exponents and the bases are the same, you can subtract them like any other like terms in algebra. For example, 3y – 2xy = x y.

Subtracting exponents with the same base

Let’s explain this concept with the help of a few examples.

Example 1

23– 22 = 8 – 4 = 4

53 – 52 = 75 – 25 = 50

Subtract x 3 y 3 from 10 x 3 y 3

In this case the coefficients of exponents are 10 and 1

The variables are like terms and hence can be subtracted

Subtract the coefficients = 10 – 1

= 9

Thus, 10x 3y 3– x 3y 3 = 9 (xy)3

You can notice that, the subtraction of exponents with like terms is done by finding the difference of their coefficients.

Subtract 8x2 – 4x2

In this case, the variables 4x2 and 8x2 are like terms and their coefficients are 4 and 8 respectively.

= 8x2 – 4x2

= (8-4) x2.

= 4 x2

Work out (-7x) – (-3x)

Here, -7x and -3x are like terms

= -7x – (-3x)

= -7x + 3x,

= -4x.

15x – 4x – 12y – 3y

Subtract like terms

15x – 4x = 11x

12y – 3y = 9y

Thus, the answer is 11x – 9y.

Subtract (4x + 3y + z) – (2x + 3y – z).

These variables are like terms

(2x + 3y – z) – (4x + 3y + z)

Open the parenthesis;

= 2x + 3y – z – 4x – 3y – z,

Rearrange the like terms, and perform the subtraction

= 2x – 4x + 3y – 3y – z – z

= -2x + 0 – 2z,

= -2x – 2z

Subtracting exponents with different base

Exponents with different bases are computed separated and the results subtracted. On the other hand, variable with unlike bases can not be subtracted at all.  For, example subtraction of a and b can not be performed and the result is just a -b.

To subtract a positive exponents m and negative exponents n, we just connect both the terms by changing the subtraction sign to a positive sign and write the result in the form of m + n.

Therefore, subtraction of a positive and a negative unlike exponents m and -n = m + n.

Example 2

42 – 32 = 16 – 9 =7

Subtract: 11x – 7y -2x – 3x.

= 11x – 2x – 3x – 7y.

= 6x – 7y

Evaluate 3x2 – 7y2

In this case, the two exponents 3x 2 and 7y2 are unlike terms and so it will remain as it is.

Here 3x and 7y both are unlike terms so it will remain as it is.

Therefore, the answer is 3x2 – 7y2

Evaluate 15x – 12y – 11x

= 15x5 – 11x5 – 12y5

= 4x5 – 12y5

300

1) Converting 5 hours

1 hour----------60 minutes

5 -------------- x

x = 300, since 5 times 60 is equal to 300 minutes.

So A, 300 minutes.

If the point (x, y) rotated 180 degrees about the origin, then its image is (-x, -y)

Since point H is (1, 0), then

H' = (-1, 0)

Since point I is (4, 0), then

I' = (-4, 0)

Since point J is (2, 1), then

J' = (-2, -1)

Since point K is (-1, 1), then

K' = (1, -1)

The coordinates of the image after rotated 180 degrees about the origin are

H' (-1, 0), I' (-4, 0), J' (-2, -1), K' (1, -1)

The time would be 6 AM at the place at 90-degree West longitude.

This is a problem with coordination and time. We can solve this problem by using a few steps.

We should recall that each degree west is equivalent to 4 minutes before.

The given place is at 90-degree West longitude. Therefore, the total time difference is (90 × 4) = 360 minutes.

360 minutes is equal to 360/60 = 6 hours.

We have to deduct the time from GST, (12 - 6) = 6 AM

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a) The small tire would  make 38  rotations

   The large tire would make 127  rotations

b) A bicycle with two large wheels would allow traveling faster with each rotation of the pedal .

The problem we are dealing with relates to rotations and circumference where rotation refers to the distance from the center to any point on the shape that remains the same and whereas the circumference is the perimeter of a circle. In one revolution a wheel covers a distance which is rise to its perimeter.Since we are provided that the diameter of the large wheel is 60 inches, so the radius will be 30 inches ( radius = diameter/2) and the radius of the small wheel is 9 inches.

The circumference of a circle  is 2πr

for a large wheel  the circumference is 2 x 3.14 X 30 = 188.4 inches

for a small  wheel, the circumference is  56.52

Since, we know 1 inch is equal to 0.0833333, as the traveling distance = 600 feet = 7200 inches.

Number of rotation = distance / circumference

For large wheel = 7200 /188.4 =38.21 = spprox 38

For small wheel = 7200/56.52 =127.38 = approx 127

Since we bicycle with bigger wheels is preferable as they can go faster than the ones with little wheels since their circumference is more as they cover more area in fewer rotations.

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Step-by-step explanation:

x is the number of students than can still join.

x <= 27 - 18

so,

x <= 9

max. 9 more students can join.

The correct statement for the best definition of an angle is,

''two rays that share a common endpoint called the vertex''.

Option B is true.

What is mean by angle?

A figure which is formed by two rays or lines that shares a common endpoint is called an angle.

Given that;

Define an angle with the help of definition.

Now,

Since, We know that;

A figure which is formed by two rays that shares a common endpoint vertex is called an angle.

Thus, the best definition of an angle is,

''two rays that share a common endpoint called the vertex''.

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Let J be Jasmine age and S the sister's age. Then, we have

this equality means Jasmine is 5 years younger than twice her sister's age. Now, we also know that J=39 years then by substituying this value into the last equality, we have

and now, we can solve this equation for S. First, we must move -5 to the right hand side as 5. It reads

and finally, we obtain

therefore, Jasmine's sister has 22 years old.

Answer:

B

Step-by-step explanation:

It says she thought half which equals to 1/2 or 0.5

The probability of raffle ticket is a winner is 0.0002.

The ratio of good outcomes to all possible outcomes of an event is known as the probability. The number of positive results for an experiment with 'n' outcomes can be represented by the symbol x. The probability of an occurrence may be calculated using the following formula.

Probability(Event) = Positive Results/Total Results = x/n

Given:

probability that your raffle ticket is not a winner = 0.9998.

Now, we know if we have to find the complement probability we can use

P(E) = 1 - P(not E)

where E is any event.

Here, E = not winner

So, P( raffle ticket is a winner)

= 1- 0. 9998                                                  

= 0.0002

Hence, the probability of raffle ticket is a winner is 0.0002.

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Answer:

y + 2 = 3/4 (x - 1)

Step-by-step explanation:

You would pick one of the points in this case I picked (1, -2), for point-slope form your equation is y - y1 = m(x-x1).

Finding the slope (m) is easy you just do rise (up/down) OVER run (left/right).

So in this case your slope (m) is 3/4.

then you just plug everything in but because two negatives equal a positive you equasion should look like this y + 2 = 3/4(x - 1)

Answer:

4.62 segments should be brought to complete the job.

Step-by-step explanation:

I guess you only need the answer so, is it okay with no explanation?

The most appropriate choice for rationalization will be given by

What is rationalization?

When a surd is present in the denominator of a fraction, the surd has to be removed form the denominator. The process by which surds in the denominator of a fraction can be eliminated is called rationalization.

Here,

let [tex]\sqrt{x}[/tex] = a

[tex]x = a^2[/tex]

[tex]\frac{2a-9}{a^2 -5a + 6} - \frac{a + 3}{a-2} - \frac{2a+1}{3-a}[/tex]

[tex]\frac{2a-9}{a^2 -2a-3a + 6} - \frac{a + 3}{a-2} - \frac{2a+1}{3-a}[/tex]

[tex]\frac{2a-9}{a(a -2)-3(a -2)} - \frac{a + 3}{a-2} + \frac{2a+1}{a - 3}[/tex]

[tex]\frac{2a-9}{(a-2)(a-3)} - \frac{a + 3}{a-2} + \frac{2a+1}{a-3}[/tex]

[tex]\frac{2a-9 - ((a + 3)(a-3)) + (2a+1)(a-2)}{(a-2)(a-3)}[/tex]

[tex]\frac{2a-9-a^2+9+2a^2-4a+a-2}{(a-2)(a-3)}[/tex]

[tex]\frac{2a-a^2+2a^2-3a-2}{(a-2)(a-3)}[/tex]

[tex]\frac{a^2-a-2}{(a-2)(a-3)}[/tex]

[tex]\frac{a^2-2a+a-2}{(a-2)(a-3)}[/tex]

[tex]\frac{a(a-2)+1(a-2)}{(a-2)(a-3)}[/tex]

[tex]\frac{(a-2)(a+1)}{(a-2)(a-3)}[/tex]

[tex]\frac{\sqrt{x} +1}{\sqrt{x} -3}[/tex]

[tex]\frac{(\sqrt{x} +1)(\sqrt{x}+3) }{(\sqrt{x} -3)(\sqrt{x} +3)}[/tex]

[tex]\frac{x + 3\sqrt{x} + \sqrt{x} +3 }{x -9}[/tex]

[tex]\frac{x + 4\sqrt{x} +3 }{x -9}[/tex]

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Answer:

Step-by-step explanation:

Given pairs of points that define three lines, you want to know their slopes, and whether line pairs are parallel or perpendicular.

The lines are defined by point pairs ...

The slope of a line is given from a pair of points by the formula ...

  m = (y2 -y1)/(x2 -x1)

Lines with the same slope are parallel.

Lines with opposite reciprocal slope are perpendicular.

Line 1 slope = (8 -4)/(-3 -0) = 4/-3 = -4/3

Line 2 slope = (4 -(-2))/(4 -(-4)) = 6/8 = 3/4

Line 3 slope = (4 -1)/(8 -4) = 3/4

The slopes of the lines are ...

Lines 1 and 2 have slopes that are opposite reciprocals (-4/3 and 3/4), so are perpendicular.

Lines 1 and 3 have slopes that are opposite reciprocals (-4/3 and 3/4), so are perpendicular.

Lines 2 and 3 have identical slopes (3/4 and 3/4), so are parallel.

The first offer is better from the perspective of a customer but the second one is better from the perspective of a seller.

Here we have different 2 cases, and to find the answer we have to follow a few steps.

First of all, we should simplify these two cases and will try to give them a proper equation format.

Let's assume the price of each yogurt is $x.

Therefore the total price of 2 pots is (2× x) = $2x.

But the condition is if we buy 2 pots, get the 3rd one for free. So, we can purchase a total of 3 pots at the same cost.

∵ If 3 pots cost $2x, then the average cost for each pot is 2x/3 =$0.67x

( average value of each unit = Total value / total unit )

In the second case, if we buy 1 pot we can get the second one at half price.

Therefore, the total price of two pots is, ( x + 0.5x ) = $1.50x

∵ If 2 pots cost $1.50x, then the average cost for each pot is 1.50x/2 = $0.75x

( average value of each unit = Total value / total unit ).

The price of yogurt per pot in the first case <  The price of yogurt per pot in the second case.

As $0.67 <  $0.75.

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log (m + n) = log m+ log n and proved it m =n/n-1​

Given;

If log (m + n) = log m+ log n

To show that the m =n/n-1​

Now, According to the question:

We know that,

Log (m + n) = log m + log n

Log (m + n ) = log (mn).                 [log a + log b = log ab ]

Cancelling the log on both sides.

then,

m + n = mn

=> n = mn - m

=> n = m (n - 1)

=> m = n / n - 1

Hence Proved

log (m + n) = log m+ log n and proved it m =n/n-1​

What is Logarithm?

A logarithm is the power to which a number must be raised in order to get some other number (see Section 3 of this Math Review for more about exponents). For example, the base ten logarithm of 100 is 2, because ten raised to the power of two is 100: log 100 = 2.

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The value of n is 1650 after oil is transferred from Tank A and Tank B to Tank C.

It is given that initially,

Oil in tank A = n

Oil in tank B = n + 150

Oil in tank C = 0

Amount of oil transferred to tank C by tank A = 500 liters

Let us say 'x' amount of oil was transferred to tank C from tank B.

The amount of oil left in tank A after transferring 500 liters to tank C = n-500

Amount of oil left in tank B after transferring 'x' litres to tank C

= n + 150 - x

Amount of oil in tank C now = 500 + x

Since it is given that all three tanks contain the same amount of oil now. i.e. the new amount of oil in tank A = new amount of oil in tank B

n - 500 = n + 150 - x

x = 650

The new amount of oil in tank B = new amount of oil in tank C

n + 150 - x = 500 + x

n = 350 + 2x

Since x = 500

n = 350 + 2*650

n = 1650

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Answer:

0.55

Step-by-step explanation:

( x1, y1 ) = ( 2, 11.9 )

Here,

x1 = 2

y1 = 11.9

( x2. y2 ) = ( 4, 13 )

Here,

x2 = 4

y2 = 13

Formula : -

Rise over run = ( y2 - y1 )/( x2 - x1 )

Rise over run = ( 13 - 11.9 )/( 4 - 2 )

                      = 1.1/2

Rise over run = 0.55

[tex]Answer:\ \boxed {-n+3}[/tex]

Step-by-step explanation:

                            y=mx+b

1.

To find m, choose any two coordinates from the table: (1,2) and (0,3)

and use the formula for the slope of the line:

                            [tex]\displaystyle\\\boxed {The\ slope\ m=\frac{y_2-y_1}{x_2-x_1} }[/tex]

[tex]\displaystyle\\m=\frac{3-2}{0-1} \\\\m=\frac{1}{-1} \\\\m=-1\\\\Hence,\ y=-x+b\ \ \ \ (1)[/tex]

2.

To find b, choose any coordinate from the table: (2,1) and substitute its values into the formula (10):

[tex]2=-(1)+b\\\\2=-1+b\\\\2+1=-1+b+1\\\\3=b\\\\Thus,\ b=3\\\\Hence, \ y=-x+3[/tex]

Answer:

x = 4

Step-by-step explanation:

80 is equal to 20x because they are alt ext angles

so

80 = 20x

divide to both sides

4 = x

that is your answer

Answer:

i believe it is 20

Step-by-step explanation:

to find the diameter you just deveide the circumference by pi thats it and i got 20.0101433

so i believe its 20

hope this helped :)

A thing's extent, size, or the total amount is its quantity.

The mixture must contain 10 pounds of affordable tea.

An answer to the question "how much?" is a quantity, which might be an amount, number, or measurement.

Numbers or unconventional units can be used to express quantities.

Quantity in more complex mathematics can also refer to an undetermined amount in an equation.

Affordable tea costs $2.00.

The price for superior tea is $5.

The price of blended tea is $4.25.

Solution:

$4.25 multiplied by 40 pounds of blended tea equals $170.

Let x represent the quantity of affordable tea, and

The superior tea quantity is (40 - x).

4.25 * 40 = 2x + 5(40 - x)

170 = 2x + 200 -5x

-3x = -30

x = 10

Therefore, the mixture should contain 10 pounds of affordable tea.

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Answer:

100/21

Step-by-step explanation:

Answer:

c=125 dollars

Step-by-step explanation:

c=25p

p(people)=5

c=25*5

c=125