Erika's lunch cost $13.00. She wants to leave a 15% tip. What is the tip amount?

Answer:

a = -8

Step-by-step explanation:

4/a + 4 = -1/a + 9

-1(a + 4) = 4(a + 9)

-1a - 4 = 4a + 36

-5a - 4 = 36

-5a = 40

a = -8

Answer:

Step-by-step explanation:

Answer: 0.86

Step-by-step explanation:

Answer:

Step-by-step explanation:

Answer:

3 A'(-1,2) B'(4,3) C'(-2,5)

Step-by-step explanation:

The rule for a 270-degree rotation: When rotating a point 270-degrees counterclockwise about the origin our point A(x,y) becomes A'(y,-x). This means, we switch x and y and make x negative.

 3 A'(-1,2) B'(4,3) C'(-2,5)

Answer:

237600

Step-by-step explanation:

do 165 x 1440

Option 1 \(\frac{y^8}{x^10}\) is the expression equivalent to the given value   \([\frac{x^{-4}y}{x^{-9}y^5}] ^{-2}\).

The way of representing huge numbers in terms of powers is known as an exponent. Exponent, then, is the number of times a number has been multiplied by itself. For instance, the number 6 is multiplied by itself four times, yielding 6 6 6 6. You may write this as 64.

Law of Multiplication: Exponents should be added while keeping the base constant when multiplying like bases.

Exponents should be multiplied while bases are kept constant when bases are raised by a power of two or more.

Division Rule: When dividing similar bases, maintain the base constant and deduct the exponent of the denominator from the exponent of the numerator.

The given expression is: \([\frac{x^{-4}y}{x^{-9}y^5}] ^{-2}\).

Using the multiplication rule for power we have:

\([\frac{x^{8}y^{-2}}{x^{18}y^{-10}}]\\\)

Now using the division rule we have:

\([\frac{y^{-2 + 10}}{x^{18- 8}}]\\\\\frac{y^8}{x^10}\)

Hence, option 1 is the expression equivalent to the given expression  \([\frac{x^{-4}y}{x^{-9}y^5}] ^{-2}\)

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Let's check the options

A.

2x - 1 = 2

2x= 3

x= 3/2=1.5

option A has atleast one solution

B

3y+ 1 = 3y

option B has no solution

C.

5p - (3 + p) = 6p + 1

5p - 3 - p = 6p + 1

4p - 6p = 1 + 3

-2p = 4

p =-2

option C has atleast one solution

D.

4/5 m = 1- 1/5 m

4/5 m + 1/5m = 1

1m = 1

m = 1

Option D has atleast one solution

E.

10 + 0.5w = 1/2w - 10

0.5 w - 1/2 w = -10 - 10

option E has no solution

F.

4a + 3(a-2) = 8a - (6+a)

4a +3a - 6 = 8a -6 - a

7a -6 = 7a - 6

option F has many solution. Hence it also has atleast one solution

Therefore;

option A, C, D and F has atleast one solution

Answer:

It would be graphed at 0.

Step-by-step explanation: The answer would be graphed at 0 on a number line because 0 is its opposite.

Hope this helps!

Answer: 107.5 to the 3rd box and 360 and basiclly 1 and 2 digets go to the other boxs

Answer:

C would be on the inverse of the function

The collection, description, analysis, and drawing of conclusions from quantitative data are all included in the area of statistics, which is a branch of applied mathematics. Probability theory, linear algebra, and calculus of differential and integrals are some of the core mathematical concepts in statistics.

Descriptive statistics were used in the statement.

Descriptive statistics is a branch of statistics that deals with the collection, presentation, and summary of data. It is used to describe and summarize the main features of a data set, such as measures of central tendency (e.g., mean, median, mode) and measures of dispersion (e.g., range, variance, standard deviation).

In this case, the statement is simply reporting a single value, the average credit card debt for college students in 2008. This is an example of a descriptive statistic because it is a summary measure that describes a characteristic of the population or sample under study.

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Descriptive statistics were used in the statement.

Descriptive statistics is a branch οf statistics that deals with the analysis, descriptiοn, and summarizatiοn οf data. It invοlves the use οf variοus statistical measures, such as measures οf central tendency (mean, median, and mοde), measures οf dispersiοn (standard deviatiοn, variance, range), and graphical representatiοns (histοgrams, bοx plοts, scatter plοts, etc.) tο describe the features οf a dataset.

Descriptive statistics were used in the statement. The statement is simply describing the average credit card debt fοr cοllege students in 2008. Descriptive statistics are used tο describe οr summarize a dataset οr pοpulatiοn, while inferential statistics are used tο draw cοnclusiοns οr make predictiοns abοut a larger pοpulatiοn based οn a sample οf data. Since the statement οnly prοvides infοrmatiοn abοut a specific grοup οf cοllege students in 2008, it dοes nοt invοlve making any inferences οr predictiοns beyοnd this grοup.

Hence, Descriptive statistics were used in the statement.

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Answer:

\(\sqrt{17}\)

Step-by-step explanation:

Knowing there is only one irrational number here the easiest way to find it is to first look for prime numbers inside of the square root. From this point we have found the irrational number, \(\sqrt{17}\), as prime numbers don't have rational numbers that could be squared to make them.

Answer:

0.4

Step-by-step explanation:

4/10

The conclusion is that the evidence is not sufficient to reject the claim that bees from the hive is the same as the specific type of honeybee having a mean wing width of 2.82 mm.

We are given the following;

Population mean; μ = 2.82 mm

Sample size; x' = 10

Thus;

Sample mean; x' = (2.88 + 2.83 + 2.91 + 2.83 + 2.94 + 2.87 + 2.80 + 2.80 + 2.83 + 2.88)/10

x' = 2.857

Using online calculator, the standard deviation is; s = 0.0467

Now, the hypotheses are defined as;

Null Hypothesis; H₀; μ = 2.82 mm

Alternative Hypothesis; Hₐ; μ ≠ 2.82 mm

The formula for the z-score of the distribution is;

z = (x' - μ)/s

Thus;

z = (2.857 - 2.82)/0.0467

z = 0.792

From online p-value from z-score calculator, we can say that;

p-value = 0.4284

This is greater than the significance value of 0.05 and as such we will conclude that we fail to reject the null hypothesis.

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Answer:

-10, -6

6, 10

Step-by-step explanation:

Let the one number be x.

One number is 3/5 of the other number.

The numbers are x and 3x/5.

Add 4 to one number, the sum equals the other number.

There are two possibilities.

A) x + 4 = 3x/5

B) 3x/5 + 4 = x

Solve A)

5x + 20 = 3x

2x = -20

x = -10

Solve B)

3x + 20 = 5x

2x = 20

x = 10

According to A)

x = -10

3x/5 = -6

According to B)

x = 10

3x/5 = 6

Answer:

-10, -6

6, 10

a=3

x=6

Explanation

Step 1

apply the distributive property to eliminate the parenthesis

Step 2

find x using Equation (1)

Step 3

find "a" using Equation(2)

I hope this helps you

Answer: The tennis match started at 12;30

Step-by-step explanation:

3:20pm - 3 hours = 12:00

one hour= 60 min

60+20=80

80-50= 30

So it started at 12:30

you could print out a picture of a clock to explain to the child how the hours changed or just draw one

Answer:16x16

Step-by-step explanation:

The average population increases every year is 21429.

Average rate is a measure of how much the function changed per unit, on average, over that interval. It is derived from the slope of the straight line connecting the interval's endpoints on the function's graph.

Given that, the population of McKinney is about 180,000.

The population is increasing at an average rate of 8.4.

So, the population increase every year

= 180,000/8.4

= 21429

Therefore, the average population increases every year is 21429.

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Howdy! My name is Christian and I’ll try and help you with this question!

Date: 9/28/20 Time:  8:11 pm CST

Answer:

10 tons

Explanation:

20000 pounds is 10 English tons

Hope this helps you with your question!

Sincerely,

Christian

Answer:

1×18=18

2×18=36

18×36= 648 inches squared

Step-by-step explanation:

Multiply both 1 inch and 2 inches by the scale factor of 18. For every one in of the scale model, there is 18 inches of the actual flag. Multiply your scaled number together to get the area.

Hope this helped!

Answer:

Domain = (-∞, ∞) Range = (-∞, ∞)

End Behavior: As X -> -∞, Y -> -∞ | As X -> ∞, Y -> ∞

Inflection Point: (2,0)

Step-by-step explanation:

Answer:

11t-2

Step-by-step explanation:

Add like terms: 3t+8t=11t -5+3=-2 11t-2

Answer: 11t-2

Step-by-step explanation:

First combine like terms

=3t-5+8t+3

= (3t+8t)-5+3

= 11t - 2

Therefore answer is 11t - 2

Must click thanks and mark brainliest

This is quite an interesting problem. I am not sure how high you are in math, but I am going to use calculus I techniques to solve it. First, we need to model an equation. Let P be the total profit and x be every time you increase the cost by $10. If you think about it hard enough you come up with the equation

\(P(x)=(200-5x)(250+10x)\)

(200-5x) is the amount of plots you will be able to sell, and (250+10x) is the amount you charge for. So, at x =0

\(P(0)=(200-5(0))(250+10(0))=(200)(250)=$50,000\)

This is the initial condition where if we sell 200 plots at $250/plot.

So, this equation makes sense.

Now, let's maximize using the first derivative of the function.

Let's get it into an easily differentiable form.

\(P(x)=(200-5x)(250+10x)=-50x^2+2000x-1250x+50000\\=-50x^2+750x+50000\)

From here, differentiate the problem.

\(P'(x)=-100x+750\)

Now, set it equal to zero and solve for x.

\(P'(x)=-100x+750=0\\x=7.5\)

This a critical point of the function. Let's plug back into the original equation to see what it gives us.

\(P(7.5)=(200-5(7.5))(250+10(7.5))=(162.5)(325)=52,812.50\)

You cant sell half a plot, so we need to see what happens if we sell 162 plots and 163 plots, and then compare which one gives us more money.

In order to sell 162 plots

\(200-5x=162\\x=7.6\)Plug back into P(x) to see the profit

\(P(7.6)=(200-5(7.6))(250+10(7.6))=(162)(326)=52,812\)

Now, do the same for 163 plots

\(200-5x=163\\x=7.4\\P(7.4)=(200-5(7.4))(250+10(7.4))=(163)(324)=52,812\)

As we can see, they are the same. So, you can charge either $324 or $326 in rent. But, if your teacher is not looking for a logical answer and you can somehow sell half a plot, you can charge $325 in rent for the maximum profit.

Answer:

  52.5 cm

Step-by-step explanation:

Assuming the scale factor is the same in all directions, for poster height h, we have ...

  height/width = h/(35 cm) = (15 cm)/(10 cm)

  h = (35 cm)(15/10) = 52.5 cm . . . . . multiply by 35 cm

The poster is 52.5 cm high.

Step-by-step explanation:

Monthly amounts added to each line

Total monthly expenses:

Answer:

Fruits:         Vegetables:

50                          42

Step-by-step explanation:

According to the diagram we can get the ratio of fruits to vegetables is 5:7

1) Fruits: 30,Let's suppose the amount of veegtables is x so, 30:x=5:7⇒5x=30*7⇒x=42

2) Vegetables: 70, lets suppose the amount of fruits is y

So, y:70 = 5:7 ⇒ 7y = 70 * 5 ⇒ y = 50{ use the ratio }

Monkey      Fruits        Vegetables

A                  30              42

B                  50             70