Mathematics College

The ratio of boys to girls in a homeroom at Twin Rivers Middle School is 3:2

If there are 12 boys, how many girls are there in the homeroom?

Answers

Answer 1

Answer:

There are 8 girls in the homeroom

The Ratio Of Boys To Girls In A Homeroom At Twin Rivers Middle School Is 3:2If There Are 12 Boys, How

Related Questions

Which sequences are geometric? Check all that apply.

–2, –4, –6, –8, –10, …
16, –8, 4, –2, 1
–15, –18, –21.6, –25.92, –31.104, …
4, 10.5, 17, 23.5, 30, …
625, 125, 25, 5, 1, …

Answers

3 Answers:

B)  16, -8, 4, -2, 1

C) -15, -18, -21.6, -25.92, -31.104

E) 625, 125, 25, 5, 1

==================================================

Explanation:

Part (A)

Divide each term over its previous term. If each result is the same, then we have a geometric sequence.

(term2)/(term1) = (-4)/(-2) = 2

(term3)/(term2) = (-6)/(-4) = 1.5

We can stop here since we got a different result.

This sequence is not geometric.

--------------------------------------

Part (B)

Same idea as part (A)

(term2)/(term1) = (-8)/16 = -0.5

(term3)/(term2) = 4/(-8) = -0.5

(term4)/(term3) = (-2)/4 = -0.5

(term5)/(term4) = 1/(-2) = -0.5

We get the same result each time. The common ratio is r = -1/2 = -0.5. This sequence is geometric.

--------------------------------------

Part (C)

(term2)/(term1) = (-18)/(-15) = 1.2

(term3)/(term2) = (-21.6)/(-18) = 1.2

(term4)/(term3) = (-25.92)/(-21.6) = 1.2

(term5)/(term4) = (-31.104)/(-25.92) = 1.2

This sequence is geometric since each result is the same. The common ratio is r = 1.2

note: 6/5 = 1.2

--------------------------------------

Part (D)

(term2)/(term1) = (10.5)/4 = 2.625

(term3)/(term2) = (17)/(10.5) = 1.619

We don't get the same result, so we can stop here. This sequence is not geometric.

--------------------------------------

Part (E)

(term2)/(term1) = (125)/(625) = 0.2

(term3)/(term2) = (25)/(125) = 0.2

(term4)/(term3) = (5)/(25) = 0.2

(term5)/(term4) = (1)/(5) = 0.2

The common ratio is r = 0.2 or r = 1/5

This sequence is geometric.

Answer:

C) -15, -18, -21.6, -25.92, -31.104

E) 625, 125, 25, 5, 1

Step-by-step explanation:

40 percent of the people in the club are new this year if there are 12 be people how many people are in the club

Answers

30? (so sorry if that’s wrong)

Answer:

The answer is 30

Step-by-step explanation:

12 ÷ 40% = 30

sec²A-cosec²A=(tanA+cotA)(tanA-cotA)​

Answers

Answer:

Step-by-step explanation:

Sec²A-cosec²A=(tanA+cotA)(tanA-cotA)

Tan^2A+1-cot^2A-1=(tan^2A-cot^2A)

tan^2A-cot^2A=tan^2A-cot^2A

L.H.S=R.H.S

Hence proved.

Josh is unpacking boxes at her job at target she unpacks 17 boxes that each have 25 regular DVDs in them she also on tax 24 boxes that each have a team blue rays TVs in them what is the total number of regular DVDs and Blu-ray’s that are on Pat Solve and explain

Answers

Answer:

1+1=4

Step-by-step explanation:

Suppose you are a civil engineer, specializing in traffic volume control for the City of Grand Rapids. Your department has been receiving a multitude of complaints about traffic wait times for a certain intersection in the heart of downtown. To see if these claims are valid, you want to monitor the true average wait time at that intersection. Over the course of a few months, you record the average number of minutes a car waits at the intersection between 4:00 PM and 5:00 PM. With a sample size of 14 cars, the average wait time is 6.313 minutes with a standard deviation of 1.6509 minutes. Construct a 90% confidence interval for the true average wait time for a car at the intersection between 4:00 PM and 5:00 PM. 1) (4.542, 8.084).2) (5.536, 7.09). 3) (-5.532, 7.094).4) (5.532, 7.094).5) (5.872, 6.754).

Answers

Answer:

90% Confidence Interval = (5.532, 7.094)

Step-by-step explanation:

With a sample size of 14 cars, the average wait time is 6.313 minutes with a standard deviation of 1.6509 minutes. Construct a 90% confidence interval for the true average wait time for a car at the intersection between 4:00 PM and 5:00 PM. 1) (4.542, 8.084).2) (5.536, 7.09). 3) (-5.532, 7.094).4) (5.532, 7.094).5) (5.872, 6.754).

We are given the sample size = 14 cars

This sample size is small so instead of using z score , we would use the t score critical value

First we need to calculate our degree of freedom

Degrees of freedom = n - 1

= 14 - 1 = 13

The t score for 90% confidence interval with a degree of freedom of 13 =

= 1.771

Hence, Confidence Interval =

Mean ± t score × standard deviation/√n

= 6.313 ± 1.771 × 1.6509/√14

= 6.313 ± 1.771 × 0.4412215843

= 6.313 ± 0.7814034257

Confidence Interval

= 6.313 - 0.7814034257

= 5.5315965743

≈ 5.532

= 6.313 + 0.7814034257

= 7.0944034257

≈ 7.094

90% Confidence Interval = (5.532, 7.094)

Peter wants to plot the point (-2, 3) on a coordinate plane. Which statement best describes how to plot this point starting from the origin?

Answers

Answer:

From the origin, go left 2 then up 3

Step-by-step explanation:

negative x value means move left, positive y value means move up

Answer:

go left 2 and go up 3

Little note:

Hope this helps

Factor the polynomial:
x2 + 5x – 14 =
х
x2 - 10x + 16 =
VX

Answers

Answer:

(x-2) and second slot is (x+7)

Second Answer= (x-2) and second slot is (x-8)

Answer:

(x-2),x-7) next set is (x-2),(x-8) then the next question is (x-2) your very welcome.

Step-by-step explanation:

im having a mental breakdown HELPPPP!​

Answers

LN is congruent to NQ so because of that you set both equal to each other

7x=5x+20

Subtract 5x on both sides

7x-5x=20

2x=20

x=10

Hope this helps!! Mark for brainliest

Five of the 25 girls on Alden Middle School’s soccer team are seventh-grade students. Find the percentage of seventh graders on the team.

Answers

Answer:

20%

Step-by-step explanation:

5 divided by 25 multiplied by 100 will give you 20%.

I hope you understand

Volume of 120 grams divided by 480cm3

Answers

Answer:

= 0.25 g/cm3

Step-by-step explanation:

this is called density the grams per volume.

density = mass

               volume

             =   120g

                480cm3

  = 0.25 g/cm3

find the missing side lengths. leave ur answers as radicals

Answers

Because of the 45 45 90 theorem since the hypotenuse is 9√2 x and y are both 9

Adam has joined a book club. The membership has an initial fee of $25.00 and each book rental costs $2.00. This table shows the linear relationship between the total cost, y, and the number of books Adam rents, x. Fill in each box to correctly model the relationship between x and y. Number of books rented, x 3 6 12 15 Total Cost, y $31.00 $ $43.00 $ $55.00

Answers

Answer:

Do you have a screenshot of the table? I’m struggling to visualise it with the data given.

Step-by-step explanation:

Answer:

$37.00 9 $49.00

Step-by-step explanation:

The populations of Cities A and B are 1.6 x 10^5 and 1,070,000​, respectively. The population of City C is twice the population of City B. The population of City C is how many times the population of City​ A?

Answers

Answer:

13.375 times

Step-by-step explanation:

1,070,000 times 2=2,140,000. 2,140,000 divided by 160,000=13.375.

B.F. Retread, a tire manufacturer, wants to select one of three feasible prototype designs for a new tire; A, B, C.

Revenues
Low (0.30) Medium (0.50) High (0.20)
A 120,000 255,000 390,000
B 130,000 295,000 460,000
C 100,000 300,000 480,000

Required:
Calculate the highest value you would pay for a highly reliable forecast.

Answers

Answer:

c

Step-by-step explanation:

i√5
Find the square of the imaginary number.

Answers

Answer:

=  [tex]-\sqrt{5} i[/tex]

Step-by-step explanation:

First, reorder the terms:

[tex]\sqrt{5} i[/tex]

Then, find the complex conjugate (a pure imaginary number is its opposite):

[tex]-\sqrt{5}i[/tex]

X+4
What is the solution of
2x-1
*** <0
?
-4 04s x51/
0
45x< 1 / 1
4 O <
.

Answers

Step-by-step explanation:

can you snap a picture for this question bcs i cant understand the question

WILL MARK BRAINIEST!!!!!!!!!!! PLEASE HELP ASAP

The figure below shows the location of 3 points around a lake. The length of the lake, BC, is also shown. A picture of a right triangle ABC with right angle at B is shown. The length of the side AC is labeled as 8 miles. The length BC of the triangle is labeled as 6 miles. This length BC is also the length of an irregular gray shaded shape. Which of the following options is closest to the distance (in miles) between points A and B?
A.) 2.24
B.) 2.65
C.) 3.74
D.) 5.29

Answers

Answer:

I think B but I'm not sure

Step-by-step explanation:

Answer:

B i think

Step-by-step explanation:

you're welcome <3

what is the common factor between 536 and 10​

Answers

Answer:

im pretty sure it is 2

Step-by-step explanation:

Let f(x) = 3x + 2 and g(x) = - 2x + 1 Find g(f(- 2))

is it
a: -7
b: 17
c: 0
d:9​

Answers

Answer:

(d) 9

Step-by-step explanation:

f(x) = 3x + 2

g(x) = - 2x + 1

g(f(x)) = - 2(3x + 2) + 1 = - 6x - 4 + 1 = - 6x - 3

g(f(-2)) = - 6(- 2) - 3 = 9

Interest paid on £2500 at an interest at an interest rate of 15%

Answers

Answer:

£375

Step-by-step explanation:

Amount = £2500Interest rate = 15%

Interest

£2500*15/100 = £375

Please help I will mark the brainiest answer please

Answers

Answer:

Part A 40

Part B 90

part C show your work

please mark brainliest i need it

Hope helps

helpppppp please I will give brainliest to anyone who can solve this and explain please only explain if you know please ​

Answers

Answer:

The second answer choice is the best one

Step-by-step explanation:

y=7/2x-3

PLEASE HELP!!!!!
What is the result when the number 59 is decreased by 7%?

Answers

Answer:

= 59 - (59*0.07)

= 59 - 4.13

= 54.87

Answer:

The result would be 54.87

Please Help ASAP

What is the equation of the line in slope-intercept form?

Line on a coordinate plane. The line runs through points begin ordered pair negative 2 comma 0 end ordered pair and begin ordered pair 0 comma 5 end ordered pair.

Enter your answer in the boxes.

y =
x +

$\text{Basic}$

Answers

Answer:

y=5/2x+5

Step-by-step explanation:

Slope intercept form is y=mx+b

m is the slope, and b is the y intercept

FIrst we have to find the slope which is rise/run

Since our points are (-2,0) and (0,5) the equation will be:

5-0/0-(-2)

5/2

The slope is 5/2

Next we have to plug in 5/2 for m:

y=5/2x+b

We know that the y intercept is 5 from the coordinate (0,5)

y=5/2x+5

Answer:

y is  5/2 and x is 5

Step-by-step explanation:

i just know it already x3

Helpppppppppppppp I’ll mark u

Answers

-35 is the answer hope this helps

Help please! I’ll give brainliest if correct!

Answers

Answer:

The formula for calculating a z-score is is z = (x-μ)/σ, where x is the raw score, μ is the population mean, and σ is the population standard deviation. As the formula shows, the z-score is simply the raw score minus the population mean, divided by the population standard deviation.

Step-by-step explanation:

Hope  his helps!

It’s B because the input 8 has more than 1 output

8)
Solve: 5x - 7x + 6 = -2(x - 3).
0)
A)
0
B)
2
infinitely many solutions

Answers

Answer:

the answer is 0 because both equations on either side cancel out thereby leaving in bare

Does anyone wanna do my homework for me (just math) plz &thx

Answers

what’s the homework for ?

I WILL GIVE 10$ paypal siif answered correctly

Answers

Answer:

donald trump can su*k my d*ck

Step-by-step explanation:

Help I don’t understand?!?!

Answers

Answer:

Which number u trynna flex bro

Step-by-step explanation:

lets go lets roll gogogogog

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