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
o-na [289]
2 years ago
7

In class 9A the ratio of boys to girls is 3:4. if there are 12 boys,how many girls are there?​

Mathematics
1 answer:
Mamont248 [21]2 years ago
3 0

16 girls. 12 divided by 4 is 3, so this means that you have to take 4 and multiply it by 4 which equals to 16.

You might be interested in
Select the two values of x that are roots of this equation.<br> 2x+11x+15= 0
Amiraneli [1.4K]

Answer:

The roots of the equation are x=-3 and x=-2.5

Step-by-step explanation:

<u><em>The correct quadratic equation is</em></u>

2x^2+11x+15=0

we know that

The formula to solve a quadratic equation of the form

ax^{2} +bx+c=0 is equal to

x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}

in this problem we have

2x^{2} +11x+15=0  

so

a=2\\b=11\\c=15

substitute in the formula

x=\frac{-11(+/-)\sqrt{11^{2}-4(2)(15)}} {2(2)}

x=\frac{-11(+/-)\sqrt{121-120}} {4}

x=\frac{-11(+/-)\sqrt{1}} {4}

x=\frac{-11(+/-)1} {4}

x_1=\frac{-11(+)1}{4}=-2.5

x_2=\frac{-11(-)1}{4}=-3

therefore

The roots of the equation are x=-3 and x=-2.5

5 0
3 years ago
If 35% people voted for Gary how many people would that be
Mekhanik [1.2K]

35% = .35.

First, you make 35% into a fraction 35/100. Then make it into simplified form.

35 divided by 5 and 100 divided by 5 35/5 = 7 and 100/5 =20.

So,

35%=.35=35/100=7/20

7/20

is your answer


8 0
3 years ago
How to factor out xsquared+6x-27
Aleks04 [339]
X^2 + 6x - 27
(x - 3)(x + 9)

The answer is: (x - 3)(x + 9).
5 0
3 years ago
The variance of a stock's returns can be calculated as the:
Tamiku [17]

Answer:

The correct option is b.

Step-by-step explanation:

The formula for standard deviation is

\sigma^2=\frac{\sum {(x-\overline{x})^2}}{n}

where, \overline{x} is mean of the data and n is number of observation.

The variance of a stock's returns can be calculated by the above formula.

Variance of stock's returns is the average value of squared deviations from the mean.

Therefore the correct option is b.

4 0
3 years ago
Is 28 cups greater or less than 14 Pints
marissa [1.9K]
Short answer: NO.

28 cups is exactly equal to 14 pints. (There are 2 cups per pint.)
3 0
3 years ago
Other questions:
  • The equation d=rt is used to calculate distance, rate, or time, where dd is the distance (in meters), r is the rate (in meters p
    14·2 answers
  • Point A is on a line that has a slope of 3. Which of these could be the coordinates of another point on the line?
    11·1 answer
  • What is the value of x? 2,3,6,7
    15·1 answer
  • Simplify the radical expression square root 121
    7·1 answer
  • Which best describes the construction of a triangle if given the segment lengths of 10 cm, 5 cm, and 4 cm?
    8·2 answers
  • A trader purchased 1,000 books at the rate of $5.40 per book and spent $200 towards transportation. If he wants to earn a profit
    5·1 answer
  • (x - 2(x + 7) = 0 pls help​
    10·1 answer
  • A contractor bought ft of sheet metal. has used ft so far and has ​$ worth of sheet metal remaining. The equation xx represents
    10·1 answer
  • Al sumar 2x+5y-4z+9 y 2x-4y+6 se obtiene?
    9·1 answer
  • The weekly salary Y of an individual is proportional to the number of hours X worked. A person who works 40 hours is paid 900$.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!