Help please and thank you

Basically, the unit rate is known as the simplest form of something. In this case, you're trying to figure out how many words he types in 1 minute.

Here's the work:

100 words = 5 minutes

100/5 = 5/5

20 words = 1 minute.

Please vote my answer the Brainliest if it helped! Don't be afraid to ask questions if you didn't understand!

Answer:

20 words per minute

"Purposive sampling" is the method employed when a researcher needs to identify a small number of important people who can provide pertinent information.

Purposive sampling, also referred as judgmental, selecting, or subjective sampling, is a type of non-probability sampling wherein the researchers pick individuals from the public to take part in their surveys based on their own judgment.

Thus, Purposive sampling is the method employed when a researcher needs to identify a small number of important people who can provide pertinent information.

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Answer:

10

54

Step-by-step explanation:

negative and a negative gives you positive.

look at -(-10) there are two negatives which gives you a positive

Answer:

the negative of a negative equals a positive like +*+=+ or -*-=+

Answer:

$2100

Step-by-step explanation:

I = prt

I = $1500(0.05)(8)

I = $1500(0.4)

I = $600

$1500 + $600

= $2100

The corresponding solutions of equations a, b, c and d are 3.35. 41.2, 7.36 and 613.2

a. 33.5 ÷ 10 = 3.35

b. 412 ÷ 10 = 41.2

c. 73.6 ÷ 10 = 73.6

d. 6,132 ÷ 10 = 613.2

When a number is divided by powers of 10, the decimal point moves to the left side by the number of places the power has  e.g

345 ÷ 10 = 34.5 (It moves one place to the left because the power of 10 is 1 i.e. 10 = 10²)

3456 ÷ 100 = 34.56 (It moves two places to the left because the power of 100 is 2 i.e. 10 = 10²)

Therefore, the solution of a, b, c and d are 3.35. 41.2, 7.36 and 613.2 respectively.

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Answer:

b

Step-by-step explanation:

to find the volume of the figure you have to multiply the with times the length times the height

2x12x9=216

Answer:

\(2x + 3 = 13 \\ 2 \times 5 + 3 = 15 \\ 10 + 13 = 15 \\ 23 = 15 \\ 23 - 15 = 8 \\ \\ 3x + 2 = 13 \\ 3 \times 5 + 2 = 13 \\ 15 + 2 = 13 \\ 17 - 13 \\ = 4 \\ \\ x - 5 = 0 \\ 5 - 5 = 0 \\ 0 = 0 \\ \\ 4x - 9 = 21 \\ 4 \times 5 - 9 = 21 \\ 20 - 9 = 21 \\ 21 - 11 \\ = 10\)

The given statement  the domain of the exponential function f(x)=a^x, a>0, a≠1, is the set of all real numbers is true.

The domain of the exponential function f(x) = a^x.

where a is a positive real number .

And a is not equal to 1 is the set of all real numbers.

This means that the function is defined for every real number x.

The exponential function grows or decays rapidly as x moves away from 0, and its graph never touches the x-axis.

Therefore, the exponential function f(x) =a^x for a>0, a≠1 having domain set of all real numbers is true.

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The above question is incomplete, the complete question is:

The domain of the exponential function f(x)=a^x, a>0, a≠1, is the set of all real numbers. true or false

Answer:

ab+ac=a(b+c)

a is a common factor

find the greatest common factor

12x+18

12x=2*2*3*x

18=2*3*3

GCF=2*3=6

12x+18=

6(2x)+6(3)=

6(2x+3)

Step-by-step explanation:

Answer:

Which is the focus of a parabola with equation x^2=4xy

The rectangle which should go in position I is rectangle A.

We are given that;

The rectangles A,B,C and D with numbers

Now,

To take the same the number of side

If we take A on 1 place

F will be on second place

And  B will be on 4th place

Therefore, by algebra the answer will be rectangle A.

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IfIf you swim 4 lengths of a pool and break a record by 0.72 second. The table shows your time for each length compared to the previous record holder. How much faster or slower is your third length than the previous record holder is: 0.54 seconds.

First step is to calculate the different in speed between first and fourth length

Using this formula

Speed =-First length time in seconds +(- Fourth length time in seconds)

Let plug in the formula

Speed=-0.23+(-0.42)

Speed=-0.65

Second step is to calculate the third length

Speed=-0.65+0.11

Speed=-0.54 seconds

Therefore If you swim 4 lengths of a pool and break a record by 0.72 second. The table shows your time for each length compared to the previous record holder. How much faster or slower is your third length than the previous record holder is: 0.54 seconds.

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Answer:

C. f(x) = x + 4

Step-by-step explanation:

Answer:

slope: -2

y intercept: 3

Step-by-step explanation:

Answer:

71/12

Step-by-step explanation:

(5 1/4 - 2 1/2) + (6 2/3 - 3 1/2)

(21/4 - 5/2) + (20/3 - 7/2)

(11/4) + (19/6)

66/24 + 76/24 = 71/12

There was a 125% change in the price of the house.

The answer can be deduced to be above 100% because the revised price represented an increase from the initial 100,000.

Tom's house cost $100000 in the year 2000.

In 2008 he sold his house for $125000.

Whatever the case, in order to solve this problem,

you must divide 100,000 by 125,000 to discover the answer. 125,000/100,000=1.25.

Then 1.25 can be converted to 125%.

So, There was a 125% change in the price of the house.

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Answer:

x=16

Step-by-step explanation:

9+3x+7=4x

9+7=x

x = 16

Answer:

x=16 is the answer to this question

(a) The critical points of the function ƒ(x, y) = (x² - 1)e^(-x² - y²) are:

1. (0, 0)

2. ((1 + √5)/2, 0)

3. ((1 - √5)/2, 0)

(b) The critical point (0, 0) is a local maximum.

To find the critical points of the function\(f\left(x,\:y\right)\:=\:\left(x^2-\:1\right)e^{-x^2-y^2}\).

we need to find the points where the partial derivatives with respect to x and y are equal to zero.

Let's start by finding the partial derivative with respect to x:

\(\frac{\partial f}{\partial x}\:=\:\left(2x\right)\left(x^2\:-\:1\right)e^{-x^2-y^2}\:+\:\left(-2x\right)e^{-x^2-y^2}\)

Setting this derivative equal to zero and simplifying, we have:

\(\:\left(2x\right)\left(x^2\:-\:1\right)e^{-x^2-y^2}\:+\:\left(-2x\right)e^{-x^2-y^2}=0\)

Factoring out \(e^{-x^2-y^2}\) and dividing by 2x, we get

\(\left(x^2-1-x\right)e^{-x^2-y^2}=0\)

Since  \(e^{-x^2-y^2}\)  is always positive and nonzero, we have:

(x² - 1 - x) = 0

x² - x - 1 = 0

Using the quadratic formula, we can solve for x:

x = (1 ± √(1 - 4(-1)))/2

x = (1 ± √5)/2

So the x-coordinates of the critical points are (1 + √5)/2 and (1 - √5)/2.

Now, let's find the partial derivative with respect to y:

\(\frac{\partial f}{\partial y}\:=\:\left(-2y\right)\left(x^2\:-\:1\right)e^{-x^2-y^2}\)

Setting this derivative equal to zero, we have:

\(\:\left(-2y\right)\left(x^2\:-\:1\right)e^{-x^2-y^2}=0\)

Since   \(e^{-x^2-y^2}\) is always positive and nonzero, we have:

y = 0

Therefore, one of the critical points occurs at (0, 0).

(b) To determine the type of critical point at (0, 0), we can use the second derivative test.

We need to calculate the second partial derivatives and evaluate them at (0, 0).

Taking the second partial derivatives, we have:

\(\frac{\partial ^2f}{\partial x^2}\:=\left(2-4x^2+4x^4\right)\:e^{-x^2-y^2}\)

\(\frac{\partial ^2f}{\partial y^2}\:=\left(x^2-1-2y^2\right)\:e^{-x^2-y^2}\)

\(\frac{\partial ^2f}{\partial x\partial \:y}\:=2xy\)

Evaluating these second partial derivatives at (0, 0), we get:

∂²ƒ/∂x²(0, 0) = 2

∂²ƒ/∂y²(0, 0) = -1

∂²ƒ/∂x∂y(0, 0) = 0

Now, let's compute the discriminant D:

D = ∂²ƒ/∂x²(0, 0) × ∂²ƒ/∂y²(0, 0) - (∂²ƒ/∂x∂y(0, 0))²

= 2 × (-1) - 0²

= -2

Since D < 0 and ∂²ƒ/∂x²(0, 0) > 0, the discriminant test tells us that (0, 0) is a local maximum.

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\( - \frac{3}{7} = 0.428571\)

Answer:

- 2/5

Step-by-step explanation:

03/7 =-0.428571429

round to the nearest tenth

-0.4 = - 4/10

convert to simplest form

- 4/10 = - 2/5

Hope this helps

This is an example of deductive reasoning. Deductive reasoning is a logical process where a conclusion is drawn from previously known facts or observations.

In this case, the fact that the person's birthday is six days after their sister's birthday, and the person's birthday is on the 12th, allows us to deduce that the sister's birthday must be on the 18th. The conclusion is derived directly from the given facts, without the need for additional observation or evidence.

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Answer: 2100

Step-by-step explanation: The equation for finding the volume of a rectangular prism is  V=whl. We can substitute any of the three numbers in for any of the three variables. So, 35x8x7.5, which equals 2100.

Answer:

x = 7

Step-by-step explanation:

These are alternate interior angles. The rule for this type of angles is that they are equal to each other. Hence, you would do the following:

2x+5 = 3x-2 (Add 2 to each side)

2x+7 = 3x (Subtract 2x from each side)

7 = x ; x = 7

I hope this helps :D

The quantity of water the farming conglomerate would use 17 years from now is 65,708.11.

The formula for calculating the amount of water that would be needed 1 years from now:

FV = P (1 + r)^N

13000 x 1.1^17 = 65,708.11

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Answer:

She would have 130 dollars

Step-by-step explanation:

There are 52 weeks in a year. So multiply 2.50 by 52. She would have 130 dollars.

Ashley can expect to save $130 for the trip in exactly one year.

Ashley decided to stop eating chocolate for one whole year to save some spending money for her senior class trip to Mexico.

The amount Ashley typically spends a week on chocolate =  $2.50.

We have to find how much Ashley can save in one year if we can save $2.50 per week.

There are 365 days in a year and we have 7 days in a week.

If we divide 365 by 7 we get,

365 / 7 = 52.14.

which means 52 weeks.

So in one year, we have 52 weeks.

We can write this statement "Ashley typically spends $2.50 a week on chocolate" as :

1 week = $2.50

Multiply by 52 on both sides.

we get,

52 x 1 week = 52 x $2.50

52 weeks = $130

Thus, we can say that in one year Ashley can save around $130 if she saves $2.50 in a week.

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By adding all the spent and divide by total number of spent,  $65.52 / 4 average spent is $16.38.

The average, also known as the arithmetic mean, is a measure of the central tendency of a set of numbers.

To calculate the average of a set of numbers, you can use the following formula:

Average = (Sum of all numbers) / (Number of items in the set)

For example, to find the average of the numbers 3, 7, and 11, you would do the following:

Average = (3 + 7 + 11) / 3 = 21 / 3 = 7

To find the average amount of money that Jeremy spends when he goes to the store, you need to add up all of the amounts he spent and then divide by the number of times he went to the store. In this case, the amounts he spent are $15.67, $18.43, $12.80, and $18.62, for a total of $65.52. Since he went to the store four times, you need to divide this total by 4 to find the average amount he spends per trip:

Average amount per trip = $65.52 / 4 = $16.38

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Standard form of given expanded form of a number is 16518.

The expanded form of the number is the splitting of numbers based on the place value, such as ones, tens, hundreds, thousands, ten thousand, and so on. The number that is represented by the sum of each digit multiplied by its place value is called the expanded form of the number.

Given

Expanded form = (5×1,000)+(7×10)+(8×1)+(4×110)+(1×11,000)

We have to convert the expanded form into standard form

= 5000 + 70 + 8 + 440 + 11000

= 16518

Thus, standard form of given number is 16518.

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Answer:

16,518

(or  1.6518 x 10⁴)

Step-by-step explanation:

Expanded form:  The digits of a number are split into individual digits based on their place value.  Each digit of a number can be written in  multiple of 1, 10, 100, 1000, etc.

Standard form:  The combination of digits written together as a single number.

The given number is not quite, but almost, written in expanded form:

(5 × 1,000) + (7 × 10) + (8 × 1) + (4 × 110) + (1 × 11,000)

For it to truly be written in expanded form, the (4 × 110) would be written as (4 × 10) + (4 × 100) and the (1 × 11,000) would be written as either (11 × 1,000) or (1 × 10,000) + (1 × 1,000).

If the number should be written in standard form as defined above, carry out the operations in the parentheses, then add them together:

\(\large\begin{array}{l c r}8 \times 1 & = & 8\\7 \times 10 & = & 70\\4 \times 110 & = & 440\\5 \times 1000 & = & 5000\\1 \times 11000 & = & 11000\\\cline{3-3}& & 16518\end{array}\)

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However, in math there is another type of Standard Form (also called "Scientific notation") that is written in the form of \(a \times 10^n\), where  \(1\leq a < 10\)  and  \(n\) is any positive or negative whole number.

To convert a number into standard form, move the decimal point to the left or right until there is one digit to the left of the decimal point.

The number of times you have moved the decimal point is the power of 10 (\(n\)).

If the decimal point has moved to the left, the power is positive.

If the decimal point has moved to the right, the power is negative.

To convert 16518 into standard form:

Move the decimal point 4 places to the left and multiply by 10 to the power of the number of places the decimal was moved (4):

⇒ 1.6518 x 10⁴

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**I have provided both standard forms, as it is not clear from the question which is required.**

The function has the vertex value of (-1, -1)

From the question, the definition of the functuion is given as

y = 2x² + 4x + 1

Start by differentiating the function

This is done as follows

y' = 4x + 4

Next, we set the differentiated equation to 0

So, we have the following equation

4x + 4 = 0

This gives

4x = -4

Divide by 4

x = -1

Next, we substitute x = -1 in the given equation y = 2x² + 4x + 1

So, we have the following equation

y = 2(-1)² + 4(-1) + 1

Evaluate

y = -1

Recall that

x = -1 and y = -1

So, we have

(-1, -1)

Hence, the vertex of the function is (-1, -1)

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The vertex of the given function y = 2x² + 4x+1 is (-1, -1) which is the correct answer would be an option (B).

The function is below given by,

y = 2x² + 4x + 1

Differentiate with respect to x to get the derivative of the above function,

y' = dy/dx = d/dx (2x² + 4x + 1)

y' = 4x + 4

Equating the derivative of the function to zero

y' = 0

4x + 4 = 0

4x = -4

Divide by 4 into both sides of the equation,

x = -1

Substitute x = -1 in the given function y = 2x² + 4x + 1

y = 2(-1)² + 4(-1) + 1

y = 2(1) - 4 + 1

y = -1

Therefore, the vertex of the given function is (-1, -1).

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Answer:

Step-by-step explanation:

\(\dfrac{3m^{-1}y^{2}}{m^{-2}}-\dfrac{5m^{2}y^{2}}{x^{2}}+\dfrac{my^{2}}{m^{-1}x^{2}}\\\\=3m^{-1-[-2]}y^{2} - \dfrac{5m^{2}y^{2}}{x^{2}}+\dfrac{m^{1-[-1]}y^{2}}{x^{2}}\\\\=3m^{-1+2}y^{2}-\dfrac{5m^{2}y^{2}}{x^{2}}+\dfrac{m^{1+1}y^{2}}{x^{2}}\\\\=3my^{2}-\dfrac{5m^{2}y^{2}}{x^{2}}+\dfrac{m^{2}y^{2}}{x^{2}}\\\\=3my^{2}-\dfrac{4m^{2}y^{2}}{x^{2}}\)