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
Mademuasel [1]
3 years ago
13

in the 9th grade, 7 of every 10 students is a girl. if there are 200 students in the 9th grade, how many of the students are gir

ls
Mathematics
2 answers:
lidiya [134]3 years ago
5 0
I’m pretty sure 140 :)
zubka84 [21]3 years ago
4 0

Ratio of girls = 7/10

So, no. of girls = 200 × 7/10 = 20×7 = 140

You might be interested in
Find the measurements (the length L and the width W) of an inscribed rectangle under the line with the 1st quadrant of the x &am
Leni [432]

The question is incomplete. Here is the complete question.

Find the measurements (the lenght L and the width W) of an inscribed rectangle under the line y = -\frac{3}{4}x + 3 with the 1st quadrant of the x & y coordinate system such that the area is maximum. Also, find that maximum area. To get full credit, you must draw the picture of the problem and label the length and the width in terms of x and y.

Answer: L = 1; W = 9/4; A = 2.25;

Step-by-step explanation: The rectangle is under a straight line. Area of a rectangle is given by A = L*W. To determine the maximum area:

A = x.y

A = x(-\frac{3}{4}.x + 3)

A = -\frac{3}{4}.x^{2}  + 3x

To maximize, we have to differentiate the equation:

\frac{dA}{dx} = \frac{d}{dx}(-\frac{3}{4}.x^{2}  + 3x)

\frac{dA}{dx} = -3x + 3

The critical point is:

\frac{dA}{dx} = 0

-3x + 3 = 0

x = 1

Substituing:

y = -\frac{3}{4}x + 3

y = -\frac{3}{4}.1 + 3

y = 9/4

So, the measurements are x = L = 1 and y = W = 9/4

The maximum area is:

A = 1 . 9/4

A = 9/4

A = 2.25

6 0
3 years ago
45 points.!!!! <br> Does a bias study mean the conclusions reached by the study are false?
miv72 [106K]
It doesnt mean they are false it just means the person giving the study is going to favor something over something else in the study. Hes basically picking favorites.
3 0
3 years ago
Read 2 more answers
Find the area of the circle. Round your answer to the nearest hundredth 3in
FrozenT [24]

Answer:

28.26 square inches

Step-by-step explanation:

Formula for area of a circle:

A=\pi r^2

Radius is 3.

A= \pi (3)^2\\A=\pi 9

Use 3.14 for pi:

A = 3.14 * 9 = 28.26\\A=28.26

The area should be 28.26 square inches.

4 0
3 years ago
32000 subtract 19500
Charra [1.4K]
 32000
-19500
______
 12500
4 0
3 years ago
Read 2 more answers
Describe how the graph of y= x – 12 is like the graph of y= x and how it is different
puteri [66]
The two graphs have the same slope.  But the graph of <span>y= x – 12 is 12 units below the graph of y = x.  We call that a "vertical translation."

</span>
6 0
3 years ago
Other questions:
  • When 18 is reduced by two-thirds of a number the result is 12 find the number
    11·1 answer
  • The kinetic energy k of an object in joules is given by the formula k=1/2mv² where m is the object's mass in kilograms and v is
    8·1 answer
  • I needddd helppppp. . . . . .
    6·1 answer
  • Mrs dayson diveded her collection of 52 glass bear into equal groups sha had 1 bear left over how manny groups did Mrs dayson ma
    7·1 answer
  • 85.4 to it's lowest terms
    14·1 answer
  • I need help with this please
    6·1 answer
  • What is the equation of the line that passes through the points (2, -4) and (-6, 6)?​
    14·1 answer
  • Ten oranges cost $ 5.80. a. What is the cost for two oranges?
    13·1 answer
  • The slope of line:<br> -6x-3y = 12
    5·1 answer
  • In a particular class of 27 students, 11 are men. What fraction of the student are men?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!