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
ale4655 [162]
3 years ago
13

if 40% of the students in the class are boys , and if there are 18 girls in the class , then how many students are in the class?

Mathematics
1 answer:
chubhunter [2.5K]3 years ago
5 0
30

60% were girls so you put this as a ratio

60/100= 18/x

You calculate x to determine the total number which would equal 30.
You might be interested in
The area of a rectangle is 144cm squared.if the length is 16cm. What's the perimeter?​
andreev551 [17]

Answer:

50

Step-by-step explanation:

rectangle area = 144 cm

Formula: A= L*H

The give the length which is 16

144 = 16*H

Since they gave u the area instead of the height, work backwards

144/16 = 16/16 *H

9 = H

Now you have the length and height

Length: 16

Height: 9

Perimeter is when you add up all the sides

The top and bottom of the rectangle is the length which is 16 so

16 + 16 = 32

The left and right side of the rectangle is the height which is 9 so

9 + 9 = 18

Now add then both

32 + 18 = 50

So the perimeter of the rectangle is 50

Hope this helped!

4 0
3 years ago
If Y varies directly with X solve the following :
tresset_1 [31]

Answer:

B) When Y = 90

X = 90 x -3

= -270

C) When X = -8

Y = 33.6(approx.)

D) When Y = 12.6

X = 12.6 x 3

= 37.8

Hope this helps!

4 0
4 years ago
cinema A sells a twelve pack of moive passes for $66. Cinema B selles a five pack of moive passes for $28. Find the cost per moi
nekit [7.7K]
CINEMA A sells each movie pass for $5.50, and CINEMA B sells each movie pass for $5.60.

To find the cost of each pass in Cinema A, all you would have to do it divide 66 by 12, where you would get 5.5, which in other words would be $5.50. And to find the cost of each pass in Cinema B, you wound divide 28 by 5,and you would get 5.6, which is in other words, $5.60.
5 0
4 years ago
Which system of inequalities represents reglon Z?<br> 6
yKpoI14uk [10]

Answer:

The system of inequalities is

y\geq 3x-2

y<-(1/5)x+2

Step-by-step explanation:

step 1

Find the equation of the solid blue line

Let

A(0,-2), B(1,1)

Find the slope of AB

m=(1+2)/(1-0)=3

The equation of the line into slope intercept form is equal to

y=mx+b

we have

m=3

b=-2 - ----> the point A is the y-intercept

substitute

y=3x-2 - -----> equation of the solid blue line

The solution of the inequality is the shaded area above the solid line

therefore

The first inequality is

y\geq 3x-2

C(0,2), D(5,1)

step 2

Find the equation of the dashed red line

Let

Find the slope of CD

m=(1-2)/(5-0)=-1/5

The equation of the line into slope intercept form is equal to

y=mx+b

we have

m=-1/5

b=2 ----> the point C is the y-intercept

substitute

y=-(1/5)x+2  -----> equation of the dashed red line

The solution of the inequality is the shaded area below the dashed line

therefore

The second inequality is

y<-(1/5)x+2

The system of inequalities is

y\geq 3x-2

y<-(1/5)x+2

3 0
3 years ago
What's the median of these numbers:<br> 14,20,24,16,20,18
faltersainse [42]
The answer to this is 19. The reason why is because the median falls between 18 and 20. After that, you have to take the middle number that falls between 18 and 20. In this case, 19. 
4 0
3 years ago
Read 2 more answers
Other questions:
  • Aunt May milks her Holstein cows twice a day. This morning she got 365 gallons of milk. This evening she got 380 gallons. She so
    10·1 answer
  • A force of 7 pounds is required to hold a spring stretched 0.4 feet beyond its natural length. How much work (in foot-pounds) is
    10·1 answer
  • Find the distance from the point to the given plane. (1, −7, 8), 3x + 2y + 6z = 5
    6·1 answer
  • 0 divided 0 don't report
    5·2 answers
  • The price of an item has been reduced by 35%. The original price was $60. What is the price of the item now ?
    14·1 answer
  • Which best describes the figure that is represented by the following coordinates
    7·2 answers
  • What is the area of a circle if the circumference is 31.4 inches ?
    9·1 answer
  • Janel has $250 in her bank account and is earning $75 a week babysitting the annoying neighbor kids. April has $720 in her bank
    14·1 answer
  • David weeds lawns in his neighborhood to earn money to buy video games. For each lawn, he charges $11.50. If he weeds 4.5 lawns
    13·1 answer
  • A chocolate factory makes 6060 chocolates in an hour .How many chocolates can it make in a day , if the factory is operational f
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!