What is x - 9.9 = 2.1 what is x

Answer:

c = [tex]\frac{1}{10}[/tex]

f= 1500

Step-by-step explanation:

Tenemos la siguiente ecuación

[tex] C = f+cm[/tex]

Tenemos los siguientes valores para m=15000, c = 3000 y para m = 20000, c=3500. Es decir, tenemos las siguientes ecuaciones

[tex] 3000=f+c15000, 3500=f+c20000[/tex]

Si restamos la segunda ecuación de la primera, tenemos que

[tex] 3500-3000 = f-f+(20000c-15000c)[/tex]

Luego

[tex] 500 = 5000c[/tex]

Entonces [tex] c = \frac{500}{5000} = \frac{1}{10}[/tex]

Si tomamos la primera ecuación, tenemos que [tex]3000-\frac{15000}{10} = f[/tex]. Es decir,

[tex] 3000-1500 = f = 1500[/tex]

Esta solución, al plantear 2 ecuaciones y dos incógnitas, plantea un sistema dos por dos.

Answer:

Step-by-step explanation:

Volume of the cylinder is = π x r x r x h = π x 2 x 2 x 9 = 113.097

Answer:

12.955

Step-by-step explanation:

you know they made errors because between all the numbers, the whole number is 12 and the rest are 0, which means that the whole number part cannot be less than 12. While for the decimal part the largest number of decimal places is 3, and that what your final answer has to have. I hope this helped :)

Answer:

962.11 or 306.25

Step-by-step explanation:

the area of a circle is  π(radius)squared

the radius is half of of the diameter which = 17.5

so *17.5 squared is 962.11

Answer:

(4/3) π units²  or  (b):  33.5 units²

Step-by-step explanation:

The area of a sector of a circle of radius r and central angle Ф is a fraction of the total area of the circle:  (Ф/[2π]) * πr².

Here we find the area of the circle to be A = π (8 units)².

                                                    60

Multiply that by the fraction  ------------- , or 1/6

                                                    360

We get:  (1/6) (π (8 units)² = (4/3) π units², or approximately 33.5 units²

The question is not complete because it is not written correctly

Complete Question:

The drama club is holding auditions for five different parts in a one act play. If 9 people audition, how many ways can the roles be assigned?

a. 362,880

b. 15,120

c. 126

d. 120

Answer:

b. 15,120

Step-by-step explanation:

In other to solve the question above, we would use the formula for permutation.

This is because when assigning 5 DIFFERENT roles to 9 people, the order of assigning the roles is important. The formula for permutation, is used when order is involved.

Permutation (n, r) = nPr = n!/(n - r)!

In the above question,

n = 9 people

r = 5 different parts

9P5 = 9!/(9 - 5)!

= 9!/4! = 9×8×7×6×5×4×3×2×1/ 4×3×2×1

= 362880/ 24

= 15,120

Therefore, the number of ways that the roles can be assigned is 15,120 ways

Answer:

78

Step-by-step explanation:

The IQR is quartile 3 - quartile 1. First, we need to find the mean of the dataset, which is 50 -- the fifth number. Then, the median of the dataset on the left of the fifth number is the first quartile, and the median of the dataset on the right is the third. We get Q1 to then be halfway between 30 and 50, or 40, and Q3 to be halfway between 56 and n, so Q3 = (56+n)/2. Since we need Q3-Q1=27, or (56+n)/2-40=27, we have (56+n)/2=67 and 56+n=134, so n = 134-56=78

Answer:

23561.9449

Step-by-step explanation:

i solved it using the formula :

[tex]2\pi \times r \frac{135}{360} [/tex]

Answer:

I did this question the other day, I think it is right, but I'm not 100% sure. Let me know if it is helpful

Step-by-step explanation:

We have been given that Toru has $80 to pay for dog grooming. The fee is $72 plus 7.25% tax. We are asked to determine whether Toru has enough money for grooming or not.

The total charges for grooming would be $72 plus 7.25% of $72.

[tex]\text{Total charges for grooming}=\$72+\$72\times \frac{7.25}{100}[/tex]

[tex]\text{Total charges for grooming}=\$72+\$72\times0.0725[/tex]

[tex]\text{Total charges for grooming}=\$72+\$5.22[/tex]

[tex]\text{Total charges for grooming}=\$77.22[/tex]

Since total cost of grooming is $77.22 and Toru has $80 to pay for grooming, therefore, Toru has enough money for grooming.

Answer:

2 to the power of 3 or 2^3

Answer: 8

Step-by-step explanation:

•2 large sheets of papers:

i)cuts in half

-left 4pieces.

ii) the cutted one (smaller ones) cutted again 1 time

-left 6pieces.

iii) the cutted one will be cutted again (2nd time.) And so...

-left 8 pieces.

Please let me know if you haven't understand any of the steps...☺

l hope u like it....

Pleeeeeeeeeeeeeeeeease mark me as a brainliestt....❤

Thankyouuuu

Answer:

what circle

Step-by-step explanation:

Answer:

It 2/5.

Step-by-step explanation:

Just did the question :)

The experimental probability of flipping a head after five flips of a coin can be calculated by finding the ratio of the number of times a head appears to the total number of flips.

In this case, since there are two possible outcomes - a head or a tail - the total number of flips is five. Let's say, after five flips, a head appears three times. The experimental probability of flipping a head would be calculated as 3 (number of heads) divided by 5 (total number of flips), which equals 0.6.  

Therefore, the experimental probability of flipping a head after five flips of the coin is [tex]0.6, or 60[/tex] %. It is important to note that the experimental probability may not accurately represent the theoretical probability, as it is based on a limited number of trials. The theoretical probability of flipping a head is 1/2, which is [tex]0.5 or 50[/tex]%.

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In triangle ABC and triangle ADE

angle A = angle A (common)

angle ABC = angle ADE

By AA similarity criterion , they are similar

Thus

AB/AD = BC/DE

4/12 = x/12

Thus x = 4

Answer:

4

Please see the photo I added, if you do not understand, specify in the comments...

Answer:

One solution: (6, -1)

Step-by-step explanation:

I have attached the work to your problem below.

Please see the attachment.

I hope this helps.

Answer:

Please refer to attached image for the graph of required circle.

Step-by-step explanation:

The center and radius equation of a circle is :

[tex](x-h)^2 + (y-k)^2 = (r)^2 ...... (1)[/tex]

Where the co-ordinates [tex](x,y)[/tex] from where the circle passes.

[tex](h,k)[/tex] is the co-ordinate of circle's center represented by O.

[tex]r[/tex] is the radius of circle.

Here, we are given that center of circle is at [tex](4,4)[/tex].

So, [tex]h = 4\ and\ k = 4[/tex].

and [tex]r = 3[/tex]

Hence, the equation (1) can be represented as :

[tex]\Rightarrow \left(x-4\right)^{2}+\left(y-4\right)^{2}=3^{2}\\\Rightarrow \left(x-4\right)^{2}+\left(y-4\right)^{2}=9[/tex]

Please refer to the image attached in the answer area for the graph of above equation of circle.

Center of circle is represented by O which is the co-ordinate (4,4).

(7,4) is another point on circle.

The radius of circle is also shown in the graph image attached.

Answer:

The question might be centered on computation on the hourly rate earned by the three friends:

Nina $12.69

Ty $8.25

Kim  $8.60

Step-by-step explanation:

Hourly rate earned=total earnings/hours worked

Nina:

Nina earned $177.60 for 14 hours,hence hourly rate is $ 12.69   ($177.60/14)

Ty:

Ty earned $148.50 for 18 hours period of work,thus earned $8.25  ($148.50/18)

Kim earned $137.60 for 16 hours duration of work,invariably Kim earned  $8.60 ($137.60/16)

From the above analysis it is clear that Nina earned the highest hourly rate of $12.69 per hour

Answer:

Step-by-step explanation:

The question might be centered on computation on the hourly rate earned by the three friends:

Nina $12.69

Ty $8.25

Kim  $8.60

Hourly rate earned=total earnings / hours of work

Nina:

Nina earned $177.60 for 14 hours,

[tex]=\frac{177.60}{14}[/tex]

=  $ 12.69 per hour

Ty:

Ty earned $148.50 for 18 hours period of work,

[tex]=\frac{148.50}{18}[/tex]

=  $8.25 per hour 

Kim

Kim earned $137.60 for 16 hours period of work,

[tex]\frac{137.60}{16}[/tex]

 $8.60 per hour

From the  analysis it is obvious that Nina earned the highest hourly rate of $12.69 per hour

Answer:

D: (18,0)

I got it right on Edge 2020

An equation is formed of two equal expressions. The correct option is D.

An equation is formed when two equal expressions are equated together with the help of an equal sign '='.

Given the two systems of equations,

y = -(1/3)x + 6

y = (1/3)x - 6

Substitute the value of y from equation one with two, we will get,

-(1/3)x + 6 = (1/3)x - 6

6 + 6 = (1/3)x + (1/3)x

12 = (2/3)x

x = (12×3)/2

x = 18

Substitute the value of x in any one of the equations,

y = (1/3)x - 6

y = (1/3)(18) - 6

y = 0

Hence, the solution of the system of equation is (18, 0).

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Answer:

Step-by-step explanation:

Given

Diver is standing [tex]7\ m[/tex] above water

Diver is at a maximum height of [tex]h=7+2=9\ m[/tex] at [tex]t=2\ s[/tex]

So, at [tex]t=2\ s[/tex] his velocity is zero

After this he will be under free fall

using

[tex]s=ut+\frac{1}{2}at^2[/tex]

here [tex]u=0[/tex]

[tex]s=\frac{1}{2}\times 10\times (3)^2[/tex]

[tex]s=5\times 9=45\ m\quad \text{(not possible)}[/tex]

but the distance between the pool and Henry is [tex]9\ m[/tex]

So, he reaches the pool before [tex]5\ s[/tex]

[tex]9=\frac{1}{2}\times 10\times (t)^2[/tex]

[tex]t=\sqrt{1.8}[/tex]

[tex]t=1.34\ s[/tex]

So, he reaches pool at [tex]t=2+1.34=3.34\ s[/tex] after diving off the board

Answer:

Ignore the answer above, the correct answer is 4.5m.

Step-by-step explanation:

If you ignore all the useless information, you'll see that the parabola Henry creates has a vertex of (2,9) (because obviously the parabola opens downwards). Using this, we can deduce the vertex form of the equation for this parabola to be y=-a(x-2)²+9. This is because the vertex is always equal to (h,k), and the vertex form of any parabola is written as y=a(x-h)²+k. Now, you can solve for a to find it is 0.5, by using (0,7) as the y-intercept (aka the diving board, his starting location). Now, you can graph y=-0.5(x-2)²+9 by using mapping notation, (I find to be the easiest), or any other strategy you'd like. Once graphed, it is clear to see that when the parabola reaches 5 along the x-axis, (simpler if you think of the x-axis as time and the y-axis as height), it is plotted at 4.5 on the y-axis. This means that after 5 seconds, Henry is 4.5 meters above the water.

Given that the area is 81 square inches, find out the length of the side of a square.

Area of Square = s^2

To find out the length, find the square root of 81.

Square root of 81 is 9.

9 x 9 = 81

Therefore, the length of a side on a square with an area of 81 inches is 9 inches.

Answer:

9

Step-by-step explanation:

just did it

Answer:

Last year we had M students.

This year we have N students.

Now, the question ask "by what percentage the number of students grow".

So we are considerating a growth, this means that we must think that M as the 100%.

Then we have that N - M is the difference between the students of last year and this year.

this means that this year we have N - M more students that last year, so the percentage of growth is:

((N - M)/M)*100%

Now you need to replace the values for N and M.

You also can notice that if N is smaller than M, you will have a negative percentage, this means that instead of a growth, we have a decrease in the number of students.

Answer:

exponential decay

Step-by-step explanation:

exponential decay describes the process of reducing an amount by a consistent percentage rate over a period of time. It can be expressed by the formula y=a(1-b)x wherein y is the final amount, a is the original amount, b is the decay factor, and x is the amount of time that has passed.Exponential decay occurs when the amount of decrease is directly proportional to how much exists.

Answer:

6

Step-by-step explanation:

you combine the a2 with 5a2 as they are the only ones with a squared, combine and you get 6a2 + 6a + 7

Answer:

[tex]\frac{1}{10}[/tex]

Step-by-step explanation:

simplify [tex]\frac{2}{20}[/tex] to get [tex]\frac{1}{10}[/tex]

Answer:

Step-by-step explanation:

Let x represent the distance between Earth and its moons.

Saturn’s rings span up to about (7.5 × 10^-1) of the distance between the Earth and its moons. It means that Saturn’s rings span is

(7.5 × 10^-1)x

If Saturn’s rings span up to 2.82 × 10^5 kilometers, it means that

(7.5 × 10^-1)x = 2.82 × 10^5

Dividing both sides of the equation by 7.5 · 10^-1, it becomes

x = (2.82 × 10^5)/(7.5 × 10^-1)

x = 3.76 · 10^5 km

Answer:

E

Step-by-step explanation:

If you add 22 onto the sum of all the points and divide by the amount of games (6), you get 12.

The score she must get during the 6th game to have a mean of 12 point score per game is 22.

The mean is the average of numbers.

Mathematically, it is represented as follows;

mean = sum of terms / number of terms

Therefore, to get a mean of 12 point score per game the 6th score can be calculated as follows:

let

x = 6th score

Hence,

8 + 12 + 10 + 6 + 14 + x   / 6 = 12

50 + x / 6 = 12

cross multiply

12 × 6 = 50 + x

72 = 50 + x

72 - 50 = x

x = 22

Therefore, the score is 22.

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Answer:

[tex]

p^2 - 5p + 4[/tex]

[tex]4p^2 - 9p + 11[/tex]

-⠀⠀⠀+⠀⠀-

[tex]-3p^2 + 4p -7[/tex]

Answer:

576-8 hours

-11 hours

Cross multiply

=576×11=6336

6336÷8=792

so 792 miles