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
Murrr4er [49]
3 years ago
6

There are 400 students in a school. Fifty five percent are girls. How many boys are there?

Mathematics
1 answer:
ki77a [65]3 years ago
5 0
1) 55% is girls, then 
100-55=45% is boys.

2) 45%=0.45                                     or  2) 400 ----100%
3)400*0.45= 180 boys                                 x -----45%      x=400*45/100=180 boys

Answer is 180 boys.
You might be interested in
You have a solid Rectangle of dough. Consider the cross sections that are formed when you slice into the cube as described. Draw
Phantasy [73]
B is the answer I think trying it tho
5 0
2 years ago
At a corner gas​ station, the revenue R varies directly with the number g of gallons of gasoline sold. If the revenue is
vfiekz [6]
<span>At a corner gas station, the revenue R varies directly with the number g of gallons of gasoline sold. If the revenue is $44.50 when the number of gallons sold is 10, find a linear equation that relates revenue R to the number g of gallons of gasoline. Then find the revenue R when the number of gallons of gasoline sold is 15.5.

Solution:
As the question mentioned the direct relationship between the quantities, hence 
10 gallons of gasoline sold =  $44.50
15.5 gallons of gasoline sold = $x
by cross multiplication, we get that
10x = 15.5 * 44.50
which implies that
x = 68.975
Thus by $</span>68.975 revenue is obtained by selling 15.5 gallons of gasoline.
7 0
3 years ago
A manufacturing company regularly conducts quality control checks at specified periods on the products it manufactures. Historic
Rina8888 [55]

Answer:

The probability that none of the LED light bulbs are​ defective is 0.7374.

Step-by-step explanation:

The complete question is:

What is the probability that none of the LED light bulbs are​ defective?

Solution:

Let the random variable <em>X</em> represent the number of defective LED light bulbs.

The probability of a LED light bulb being defective is, P (X) = <em>p</em> = 0.03.

A random sample of <em>n</em> = 10 LED light bulbs is selected.

The event of a specific LED light bulb being defective is independent of the other bulbs.

The random variable <em>X</em> thus follows a Binomial distribution with parameters <em>n</em> = 10 and <em>p</em> = 0.03.

The probability mass function of <em>X</em> is:

P(X=x)={10\choose x}(0.03)^{x}(1-0.03)^{10-x};\ x=0,1,2,3...

Compute the probability that none of the LED light bulbs are​ defective as follows:

P(X=0)={10\choose 0}(0.03)^{0}(1-0.03)^{10-0}

                =1\times 1\times 0.737424\\=0.737424\\\approx 0.7374

Thus, the probability that none of the LED light bulbs are​ defective is 0.7374.

6 0
3 years ago
Find the area. Simplify your answer
castortr0y [4]

Answer:

Solution given:

length[l]=3x+7

breadth [b]=2x+3

we have

area of rectangle=l×b=(3x+7)(2x+3)

=6x²+14x+9x+21=6x²+23x+21 units ²

3 0
2 years ago
I NEED HELP WILL GIVE YOU 100 POINTS!!!! IF SOLVED CORRECTLY ​
Dafna11 [192]

Answer:

The edge lengths are 3 for all of them. Radical cubed 27 is also 3.

Step-by-step explanation:

27/ 3 = 9.  The  square root of 9 is 3.  So 3 * 3 * 3 = 27. For the bottom answer, it is 3 since 3 * 3 * 3 = 27.

How simple is this answer. I don't understand your problem.

6 0
3 years ago
Other questions:
  • 39 decillion times 1550000000
    12·2 answers
  • Given: BA = 6 feet
    12·1 answer
  • Hexagon DEFGHI is translated on the coordinate plane below to create hexagon D'E'F'G'H'I':
    9·1 answer
  • Adela divided of a cup of bird food equally among 6 birds. How much food did she give each bird? The dividend is The divisor is
    7·2 answers
  • What is the surface area of the prism?
    8·2 answers
  • Whats the area of a rectangle 17ft 4ft​
    6·2 answers
  • Find the volume and surface area of a sphere with a radius of 6cm.
    14·1 answer
  • Need help with my math hw
    6·1 answer
  • If y = x² + 2x + 3, find the value of y when x = -1
    7·1 answer
  • N(n+1)+3=45 what number n makes?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!