Mathematics College

find the area of an equilateral triangle (regular 3-gon) with the given measurement 9-inch A=sq. in.

Answers

Answer 1
assuming is a 9 inch side.

[tex]\bf \textit{area of an equilateral triangle}\\\\ A=\cfrac{s^2\sqrt{3}}{4}\qquad \begin{cases} s=length~of\\ \qquad a~side\\ -------\\ s=9 \end{cases}\implies A=\cfrac{9^2\sqrt{3}}{4}\implies A=\cfrac{81\sqrt{3}}{4}[/tex]

Related Questions

Can you please explain this

Answers

1st triangle is isoceles triangle as one as two angles are equal due to the equal sides......
2nd triangle is equilateral triangle as all sides are same
The two triangles are not congruent because we do not know if the third sides of both triangles are congruent. We can see that the first and second sides are congruent to their corresponding sides in the 2nd triangle. However, if we do not know that the third side in the first triangle is congruent to its corresponding side in the second triangle, then we cannot conclude that the two sides are congruent.

Buying something in order to increase social status is known as _____ consumption.

1 Conspicuous
2 Emotional
3 Research
4 Wise

Answers

1) conspicuous consumption

1) Conspicous Consumption

translated 2 units left and 9 units down

Answers

Move 2 times to the left and go down 9 times i think....

The translation of the given expression is "[tex]\bold{y=(x+2)^2-9}[/tex]"

Translation of equation:

Given:

"translated 2 units left and 9 units down".

we assume the equation is "y" so, the translation of the above-given expression is equal to "[tex]\bold{y=(x+2)^2-9}[/tex]".

Please find the attached diagram for the translated expression.

Find out more information about the translation here:

brainly.com/question/24649944

Select three rations that are equivalent to 7: 6.

Answers

14:12
21:18
28:24
............

Admission to the state fair costs $5 and each ride costs $0.75. If Ahmed wants to spend no more than $14 at the fair, how many rides can he ride? 
-Show All Work Please- 

Answers

14-5= 9

9 divided by .75 = 12

He can ride 12 rides.

jack has 3 quarters, 2 dimes, and one penny. how much money does jack have in all? show your work.

Answers

75+20+1=96 cents


your welcome

what is the product of (2p+7)(3p^2+4p-3)

Answers

we know that
(2p+7)(3p²+4p-3)=2p*[3p²+4p-3]+7*[3p²+4p-3]
resolving by parts

part 1
2p*[3p²+4p-3]=6p³+8p²-6p

and 
part2
7*[3p²+4p-3]=21p²+28p-21

adding part 1 and part 2
[6p³+8p²-6p]+[21p²+28p-21]=6p³+29p²+22p-21

the answer is (6p³+29p²+22p-21)

a motorboat travels 432 kilometers on 6 hours going upstream and 384 km in 4 hours going downstream. What is the rate of the boat in still water and what is the rate of the current.
please help slove and steps

Answers

Going upstream: 432 km / 6 hours = 72 km/h
Going downstream: 384 km / 4 hours = 96 km/h
Going upstream against the current means that the effective speed is:
r_boat - r_current = 72
Meanwhile, going downstream with the current means;
r_boat + r_current = 96
Adding both equations (to cancel out r_current) gives:
2r_boat = 72 + 96
r_boat = 84 km/h
Substituting back into one of the original equations: r_current = 12 km/h.

Koji is installing a rectangular window in an office building. The window is 8/23 feet wide and 5/34 feet high. The formula for the area of a rectangle is A=bh. What is the area of the window? Enter your answer as a mixed number in simplest form in the box. $$ ft2

Answers

Here, We know, Area = Base * Height
We have: b = 823 Ft
h = 534 Ft

Substitute their values, 
A = 823 * 534
A = 439482 Ft²

In short, Your Answer would be: 439482 Ft²

I really hope this helps!

Which of the following is the same as 5(2 − 1)?

a 5 − 2 − 1

b 5 × 2 × 1

c 10 − 1

d 10 − 5

e one of the above

Answers

I believe it would be D

Help with this math question please

Answers

Re-arranging the inequality to find the test points:

[tex]x- \frac{70}{x}\ \textless \ -3 \\ \\ x- \frac{70}{x}+3\ \textless \ 0 \\ \\ \frac{ x^{2} -70+3x}{x}\ \textless \ 0 \\ \\ \frac{(x-7)(x+10)}{x}\ \textless \ 0 [/tex]

This means, we need to test the inequality for x = -10, x = 0 and x = 7

Since question assumes that x > 0, so we ignore the values less than 0.
So the test points are x = 0 and x = 7

At x = 0 the expression is undefined.
Between x = 0 and x = 7 the value of expression [tex] \frac{(x-7)(x+10)}{x}[/tex] is negative. At x = 7 the value of expression is 0. Above x = 7 the value of expression is positive. 

So, the solution to the given inequality will be 0 < x < 7.
In Interval notation, the solution can be written as (0,7)

pete's dog weighed 30 pounds . then lost 16% of its weight , how much weight did the dog loose

Answers

The dog would now way 25.2 pounds, having lost 4.8 pounds.
the dog had lost 4.8

5.1 times 10 to the fourth power

Answers

The answer is 6,765,201. I apologize if I got this wrong.
5.1*10=51
so, 51*51*51*51=6765201

-4x-2y=-12 and 4x+8y=-24 using addition/eliminatin method

Answers

Use the elimination method:

-4x - 2y = -12
+4x + 8y = -12
--------------------
 0  + 6y = -24

6y = -24
6y/6 = -24/6
y = -4

Plug in -4 for y in one of the equations
-4x - 2y = -12
-4x - 2(-4) = -12
-4x + 8 = -12
-4x + 8 (-8) = -12 (-8)
-4x = -20
-4x/-4 = -20/-4
x = 5

x = 5, y = -4

hope this helps
elimination method is best because one equation has 4x and the other has -4x. Add the two equations together.

 -4x - 2y = -12
+4x + 8y = -24
----------------------
   0 + 6y = - 36

divide by 6 both sides 
y = -6 

use this to find x in either equation.
4x + 8(-6) = -24
4x  - 48 = -24
4x = -24 + 48
4x = 24
x = 6

Can someone explain? Please help! 15 pts!!!!

Answers

Let 
x--------------> the third stone measure

we know that
the recommended height for the bench is ------> 20 in
20=[4 3/8]+[4 1/2]+[5 1/4]+[x]
4 3/8---------> (4*8+3)/8=35/8
4 1/2---------> (4*2+1)/2=9/2
5 1/4---------> (5*4+1)/4=21/4

20=[35/8]+[9/2]+[21/4]+[x]

x=20-(35/8)-(9/2)-(21/4)

x=20-(35+4*9+2*21)/8-----> 20-113/8------- > (8*20-113)/8

x=47/8---------- > 5.875=5 7/8


the answer is 5 7/8 in



Can someone help please? solve by system on inequalities solve each system by graphing

Answers

If you're going to solve by graphing, a graphing calculator is helpful.

The doubly-shaded area to the right of both lines is the solution space. The line at the upper boundary of that space is also part of the solution. The line at the lower boundary is not. The marked point where the lines intersect is not part of the solution space.

In a local survey, 100 citizens indicated their opinions on a revision to a local land use plan. of the 62 favorable responses, there were 40 males. of the 38 unfavorable responses, there were 15 males. if one citizen is randomly selected find the probability a male and has a favorable opinion

Answers

This is a conditional probability. 
Denote the events like this:
F: Getting a favorable response .
First compute the number of participants: 62+38= 100.
The number of Male with favorable opinion: 40. 
We deduce the probability:
[tex]P(F\vert M)=\dfrac{40}{100}=\dfrac{2}{5}[/tex]

The probability that a male and has a favorable opinion is selected is 2/5

Further explanation

The probability of an event is defined as the possibility of an event occurring against sample space.

[tex]\large { \boxed {P(A) = \frac{\text{Number of Favorable Outcomes to A}}{\text {Total Number of Outcomes}} } }[/tex]

Permutation ( Arrangement )

Permutation is the number of ways to arrange objects.

[tex]\large {\boxed {^nP_r = \frac{n!}{(n - r)!} } }[/tex]

Combination ( Selection )

Combination is the number of ways to select objects.

[tex]\large {\boxed {^nC_r = \frac{n!}{r! (n - r)!} } }[/tex]

Let us tackle the problem.

This problem is about Probability.

Given:

Of the 62 favorable responses, there were 40 males and 22 females.

Of the 38 unfavorable responses, there were 15 males and 23 females.

There were total (40+15) males = 55 males

Let P(M) = probability a male is selected

[tex]P(M) = \frac{\texttt{Number of Male Citizens}}{\texttt{Total Number of Citizens}}[/tex]

[tex]P(M) = \boxed{\frac{55}{100}}[/tex]

There were 62 favorable responses

Let P(F) = probability citizens has a favorable opinion is selected

[tex]P(F) = \frac{\texttt{Number of Favorable Opinion Citizens}}{\texttt{Total Number of Citizens}}[/tex]

[tex]P(F) = \boxed{\frac{62}{100}}[/tex]

Let P(M ∪ F) = probability a male or citizens has a favorable opinion is selected

[tex]P(M \cup F) = \frac{\texttt{Number of Favorable Opinion Citizens or Male Citizens}}{\texttt{Total Number of Citizens}}[/tex]

[tex]P(M \cup F) = \frac{40 + 15 + 22}{100}[/tex]

[tex]P(M \cup F) = \boxed{\frac{77}{100}}[/tex]

At last , the probability a male and has a favorable opinion could be calculated as follows:

[tex]P(M \cap F) = P(M) + P(F) - P(M \cup F)[/tex]

[tex]P(M \cap F) = \frac{55}{100} + \frac{62}{100} - \frac{77}{100}[/tex]

[tex]P(M \cap F) = \frac{40}{100}[/tex]

[tex]P(M \cap F) = \large{\boxed {\frac{2}{5}} }[/tex]

Learn moreDifferent Birthdays : https://brainly.com/question/7567074Dependent or Independent Events : https://brainly.com/question/12029535Mutually exclusive : https://brainly.com/question/3464581

Answer details

Grade: High School

Subject: Mathematics

Chapter: Probability

Keywords: Probability , Sample , Space , Six , Dice , Die , Binomial , Distribution , Mean , Variance , Standard Deviation

Which is greater 320 fl oz of 18 pt

Answers

16 ounces = 1 pint
320/16 = 20 pints

320 fl oz is greater than 18 pt

how do you graph y=2sin(2x)

Answers

Graph the trigonometric function using the amplitude, period, phase shift, and vertical shift.
on the a axis, you set the x value at 0, π/4, π/2, 3π/4, π
2sin0=0, 2sin(π/2)=2, 2sinπ=0, 2sin(3π/2)=-2, 2sin(2π)=0
so the y values are 0, 2, 0, -2, 0 respectively
locate the points and connect
extend the pattern left and right if there is no limit for x. It should look like a wave

A town has two fire engines, a and b, that operate independently. the probability that engine a is available when needed is 0.96. the probability that engine b is available when needed is also 0.96. 12. what is the probability that neither fire engine is available when needed?

Answers

P(both unavailable) = P(A unavailable)*P(B unavailable) = 0.04^2 = 0.0016

If the correlation between height and weight of a large group of people is 0.75​, find the coefficient of determination​ (as a​ percent) and explain what it means. assume that height is the predictor and weight is the​ response, and assume that the association between height and weight is linear.

Answers

Independent variable is the predictor variable which is the height and dependent variable is the response variable which is weight in this scenario.

The square of correlation coefficient gives the coefficient of determination. It is denoted by R² (R squared).

We are given:
R = 0.75

So,
R²  = 0.75²

R² = 0.5625

R²  = 56.25 %
The coefficient of determination tells how much of the trend of dependent data can be explained by the independent data using the linear regression model. So in the given case, Height can explain 56.25% of the trend in the weight.

Answer:

Step-by-step explanation:

Given that  the correlation between height and weight of a large group of people is 0.75

Coefficient of determination = [tex]R^2 =0.75^2 =0.5625=56.25%[/tex]

Coefficient of determination gives us the strength of association between two variables and how much the variability of the response variable i.e. weight is due to the variability of the predictor variable i.e. height

When there is a linear association correlation coefficient square gives us the reason for the variability and percentage due to the variability in predictor variable

how would you graph y=| x-2|-4

Answers

To graph ty function simply make a table of values, where you choose any value for x and substitute that value in the function.

Then take the absolute value of the expression in the square bracket.

It is always positive, the absolute value of -6 is 6 etc.

Then graph the resulting points.

Another way to do it is simply draw the graph of y = |x| then move it 2 spaces to the right and 4 spaces down, I believe.

Imagine a world in which only decimal,not fractions,are used.how would your life be different

Answers

This answer depends a bit on your age, the types of activities you partake in and the kind of work you do/are planning to do but here goes:

I am thinking of some uses of fractions where decimals are not typically used. One might be cooking. Often the ingredients (1/2 cup of four and so on) are measured using fractions. If you were in a world with decimals you might need to make (1/3) the servings of a recipe that calls for 1/4 of a cup of some ingredient and instead of 1/12 have to deal with a long repeating decimal that probably would need to be approximated so would not be precise.

While on the subject of food ordering pizza (1/2 with pepperoni, 1/4 mushrooms and 1/4 plain) would be doable after you got used to it but probably not as comfortable. Dividing up slices of pizza among friends (one slice is usually 1/8 of a pie) might be awkward though eventually doable.

Estimation - the biggest issue is exactitude versus estimation. When we use a fraction like 1/3 that is an exact value, but when we use .333 or .3333333 no matter how many 3s we use we are only estimating because the 3s go on forever and we can't write them forever. Yes, we can use .3 (with a bar over the 3, but now try to multiply that with .456565656 with a bar over the 56. This becomes practically impossible unless we estimate ... so the biggest issue would be that you would lose precision in many calculations and measurements and have to deal with answers that are good enough (but not exact).

Now say you work on some major car company or you design bridges or you are a scientist developing medicine that cures diseases, would not you want the ability to measure and compute precisely? If I split the pizza up wrong it is not a big deal. If I use a little more flour or a little less than I should in the recipe it might not make much of a difference in the end but if I am doing something that impacts the health, safety or well being of another human being, I would not want to live in a world where I have to estimate and can't count on having the exact, precise value.

what do i do?? i just have to find what the the question marks show.

Answers

------------------------------------------------------
Given information
------------------------------------------------------
100%  = $27.60

------------------------------------------------------
Rewriting it
------------------------------------------------------
[tex]\$27.60 = 100 \%[/tex]
[tex]\$1 = 100 \div 27.60 \%[/tex]
[tex]\$1 = \frac{250}{69} \%[/tex]

------------------------------------------------------
Find $4.14 in percentage
------------------------------------------------------
[tex]\$1 = \frac{250}{69} \%[/tex]
[tex]\$4.14 = \frac{250}{69} \times 4.14[/tex]
[tex]\$4.14 = 15%[/tex]

------------------------------------------------------
Answer: 15%
------------------------------------------------------


------------------------------------------------------
Find $31.74 in percentage
------------------------------------------------------
[tex]\$1 = \frac{250}{69} \%[/tex]
[tex]\$31.74 = \frac{250}{69} \times 31.74[/tex]
[tex]$31.74 = 115%[/tex]

------------------------------------------------------
Answer: 115%
------------------------------------------------------

Samples of size n = 9 are selected from a population with μ = 80 with σ = 18. what is the expected value of m, the mean of the distribution of sample means?​

Answers

Answer: 
80

Explanation:
The mean of the distribution of sample means always target the population mean. What this line tells is that whatever the population mean will be, the mean of the distribution of sample means will be same. Since the population mean is 80, the mean of distribution of sample means will also be 80.

However, the standard deviation of the sample distributions is different and is equal to the population standard deviation divided by square root of sample size. So in this case the standard deviation of distribution of sample means will be 6 .

Carlisle is testing different types of planting soil to determine which type is most effective in growing blueberry bushes. He purchases 2 different brands of planting soil from a local store. Carlisle applies Brand A to an area of the yard that receives full sunlight and Brand B to another area of the yard that is in partial shade. He waters both areas daily. At the end of the study, Carlisle concludes Brand A is more effective in growing blueberry bushes. Why is his conclusion not valid?

Answers

This conclusion is not valid because BOTH SOIL BRANDS WERE NOT SUBJECTED TO THE SAME CONDITIONS. 
Carlisle applied brand A to the part of the yard that received full sunlight while brand B was applied to the area of the yard which received partial sunlight. This implies that the soils were subjected to different conditions and this ought not to be so, since sunlight is a very important factor, which the soils need.
His conclusion is not valid because his dependent variables weren't the same. When testing out an independent variable, which is the soil in this case, all the other factors of the experiment has to remain the same in order to provide a correct conclusion. Since Carlisle was testing out two different types of soils, he had to set all the other conditions of the plants exactly the same, including the amount of lights that the plants receive. Brand B received full sunlight whereas brand A received less. This could definitely have impaired the results of this experiment, therefore, making it invalid.

Distance between New York and San Francisco is 2539.79 MI a train travels at an average speed of 90 miles per hour what equation shows the relationship between distance traveled (Dl speed (s) and time taken (t)

Answers

D = s*t . . . . . . . distance is the product of speed and time

_____
If you want to know the time it takes to get from New York to San Francisco, you can substitute the given values and solve for t.
  2539.79 = 90t
  2539.79/90 = t ≈ 28.2199 . . . . hours

Liliana used 4 dark power crystals to raise 14 zombie soldiers. She wants to know how many zombie soldiers (z) she can raise with 10 dark power crystals. How many zombie soldiers can Liliana raise with 10 power crystals?

Answers

4c = 14z.
1c = 3.5z.
10c = 35z.
So she can raise 35 with 10 power crystals. Hope it helps !:)

Answer:- Liliana can raise 35 zombie soldiers with 10 power crystals.


Explanation:-

Let the number of zombie soldiers raised by 10 dark power crystals be 'x'.

Zombie raised by 4 power crystals = 14

Since the number of zombie and power crystals are in direct proportion.

Therefore, we get

[tex]\frac{x}{10}=\frac{14}{4}[/tex]

Multiply 10 on both the sides, we get

[tex]\Rightarrow\ x=\frac{14}{4}\times10=35[/tex]

Liliana can raise 35 zombie soldiers with 10 power crystals.

A prism is comply filled with 3996 cubes that have edge lengths of 1/3 inches. What is the volume of the prism

Answers

The volume of a cube by definition is:
 V = L ^ 3
 Where:
 L: side.
 We have then that the volume of a cube is:
 V = (1/3) ^ 3
 V = 1/27
 Then, the prism volume is:
 Vtotal = 3996 * V
 Vtotal = 3996 * (1/27)
 Vtotal 148 inches ^ 3
 Answer:
 the volume of the prism is:
 Vtotal 148 inches ^ 3

round 543,873 to nearest ten thousand

Answers

For this case we have the following number.
 543,873

 1) Remember that when rounding the number to the nearest tousand, the number must have the first three digits (from right to left) equal to zero.

 2) The fourth digit of the number (from right to left) must be rounded to the next number only if the third digit (from right to left) is greater than or equal to 5.

 3) Following steps 1) and 2) we have the number rounded to the nearest tousand is:544,000

 Answer:
 Round to the nearest tousand:
 544,000

Final answer:

To round 543,873 to the nearest ten thousand, we assess the digit in the ten thousand's place (4) and the digit to its right (3). Since the latter is less than 5, we round down, resulting in 540,000.

Explanation:

The question asks to round the number 543,873 to the nearest ten thousand. To do this, we look at the digit in the ten thousand's place, which is 4, and then look at the digit to its right, which is 3. If the digit to the right is 5 or above, we would round up. However, since it's less than 5, we round down. Therefore, 543,873 rounded to the nearest ten thousand is 540,000.

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