1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
allsm [11]
3 years ago
7

The ratio of boys to girls at a school is 9 to 11. If 400 students attend the school, how many are girls?

Mathematics
2 answers:
pentagon [3]3 years ago
6 0
Total ratio=9+11=20
number of girls=11/20*400
                          =220
xxTIMURxx [149]3 years ago
3 0

Answer:  220

Step-by-step explanation:

Given : The ratio of boys to girls at a school is 9 to 11.

Let the number of boys be 9x and the number of girls be 11x.

Since there are 400 students attend the school.

Then we have the following equation :-

9x+11x=400\\\\\Rightarrow\ 20x=400\\\\\Rightarrow\ x=\dfrac{400}{20}=20

Now, the number of girls = 11x = 11(20)=220

Hence, there are 220 girls.

You might be interested in
The rectangle below has an area of zº +82 + 15 square meters and a width of 2 + 3 meters.
Lelu [443]

Answer:

(x + 5) m

Step-by-step explanation:

From the question given above, the following data were obtained:

Area (A) = (x² + 8x + 15) m²

Width (W) = (x + 3) m

Length (L) =?

The lenght of the rectangle can be obtained as follow:

A = L × W

x² + 8x + 15 = L (x + 3)

Divide both side by x + 3

L = x² + 8x + 15 / x + 3

L = (x + 5) m

Please attached photo for explanation.

Therefore, the length of the rectangle is: (x + 5) m

8 0
3 years ago
Find the lowest common denominator for the following fractions.
Marat540 [252]
Your answer is 6 because 6 is the smallest number that is divisible by both 2 and 3
6 0
2 years ago
Read 2 more answers
What is the sum, product of <br><img src="https://tex.z-dn.net/?f=2%20%7Bx%7D%5E%7B2%7D%20%20%2B%203x%20%3D%200" id="TexFormula1
spin [16.1K]
I believe the sum of the root is: -3/2
And the product of the root is: 0

I hope this helps and have a great week :)
3 0
2 years ago
A point p in the first quadrant lies on the parabola y=x^2. Express the coordinates of p as a function of the angle of inclinati
max2010maxim [7]

Answer:

  • The coordinates of the point p are:       (x,xtan\alpha )

                   

           

Explanation:

1. Name the angle of inclination of the line joining p to the origin α.

2. Find the relation between the coordinates of the point (x,y)

When you draw a line from the origin to the parabola, the intersection point, p(x,y) will have coordinates (x,y).

As per the definition of the tangent trigonometric ratio you have:

  • tan\alpha =\frac{y}{x}

From which you can clear y:

  • y=xtan\alpha =>(x,y)=(x,xtan\alpha )

Which is the expression of the coordinates of p as a function of the angle of inclination of the line joining p to the origin.

8 0
3 years ago
Help me please this is due in a couple minutes
dsp73

Answer:

v=0.79x+3.99

f=1.89x+5.49

combined cost: 2.68×+9.48

8 0
3 years ago
Other questions:
  • Which one of those is it
    15·1 answer
  • The larger of two numbers is 2 more than 4 times the other. Their sum is 33. Find the two numbers. How do I answer this?
    9·1 answer
  • Jack brought a keyboard priced at $183.60 the sales tax was found by multiplying the price of the keyboard by 0.05 what was the
    11·1 answer
  • Distributive property to write an equivalent expression 9(9m+3t)
    11·1 answer
  • Help with this percentage question plz
    15·2 answers
  • 18 is 45% of what number? ____<br> Please help me I can't solve this
    7·1 answer
  • A research report claims that 20% of all individuals use Firefox to browse the web. A software company is trying to determine if
    13·1 answer
  • Write 0.54 as a fraction.
    7·2 answers
  • What is the mean of the normal distribution shown below?
    10·2 answers
  • Help me pls dont write fake answers pls
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!