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
Virty [35]
3 years ago
6

Forty students are In Science club. Of those 45% are girls. This percent increase 56% after new girls join the club. How many ne

w girls joined?
Mathematics
1 answer:
stepan [7]3 years ago
8 0
45% of 40 is 0.45×40=18 girls
if x girls join then 56% of 40+x is 0.56(40+x)=18+x
22.4+0.56x=18+x
put together like terms
4.4=0.44x
<span>x=10 girls joined</span>
You might be interested in
Find four consecutive integers whose sum is 290.
Ede4ka [16]
For an instance, n is the smallest number, then the other number will be (n + 1), (n + 2), (n + 3)

Write an equation based on the problem
the sum of the numbers = 290
n + n + 1 + n + 2 + n + 3 = 290
4n + 6 = 290
<em>This is the equation</em>

Solve the equation
4n + 6 = 290
4n = 290 - 6
4n = 284
  n = 284/4
  n = 71
The smallest number is 71

Find the other three numbers
n + 1 = 71 + 1 = 72
n + 2 = 71 + 2 = 73
n + 3 = 71 + 3 = 74
The other numbers area 72,73,74
8 0
3 years ago
Read 2 more answers
Listed below are the amounts​ (dollars) it costs for marriage proposal packages at different baseball stadiums. Find the​ range,
yulyashka [42]

Answer:

Range = 2460 dollars, Variance = 516414.6 dollars^2, Standard deviation = 718.6199 dollars . There are two outliers and they are likely to have much of an effect on the measures of variation.

Step-by-step explanation:

The smallest value in the sample data is min = 50 dollars and the largest value is max = 2500 dollars, therefore, the range is Range = max - min = 2500 - 40 = 2460 dollars. On the other hand, the formula to compute the sample variance is S^2 = \frac{1}{n-1}\sum_{i=1}^{n} (x_{i}-\bar{x})^2 where \bar{x} is the sample mean, n is the sample size and the x_{i} are the sample values. In this case the sample variance is s^2 = 516414.6 dollars^2, the sample standard deviation is defined as the squared root of the sample variance, so, the sample standard deviation is s = 718.6199 dollars. There are two outliers because 1750 dollars and 2500 dollars are very different compared to the other values, these two numbers are very large and they are likely to have much of an effect on the measures of variation because these measures are sensible to outliers, they are no robust measures.

3 0
3 years ago
Read 2 more answers
This table reflects the result of a survey conducted in a town to find out the number of cars of a particular color.
inysia [295]

the range that would be the most appropriate to represent the numerical data on the vertical axis is B. 20 to 100.

<h3>what range would be most appropriate?</h3>

the table is not included but the range of 20 to 100 is most appropriate for the number of cars in town with a particular color.

this is because towns would normally have between hundreds and thousands of cars which means that cars of a particular color would be between 20 and 100 at least.

find out more on bar graph ranges at brainly.com/question/25196929.

#SPJ1

6 0
1 year ago
Elijah walked 6 miles in 3 hours.what was his walking rate in hours per miles?
postnew [5]

Answer:

2 Miles per hour

Step-by-step explanation:

velocity (speed) formula is distance/time.

In this case, 6/3=2

5 0
2 years ago
Does somebody know how to find area of a trapizoid???
motikmotik

Answer:

To find the area of a trapezoid, multiply the sum of the bases (the parallel sides) by the height (the perpendicular distance between the bases), and then divide by 2.

Step-by-step explanation:

:) Hope this helps you with what you're working on!

5 0
1 year ago
Read 2 more answers
Other questions:
  • A triangle has sides of lengths 9, 7, and 12. Is it a right triangle? Explain.
    14·1 answer
  • Draw 13 ones and 2 hundred
    5·1 answer
  • Only 4 true or false questions :3
    5·2 answers
  • There was a surplus of office space in a city, with 400,000 square feet, or 16% of the total office space, vacant. How much offi
    12·1 answer
  • Which line plot matches the set of data? <br> 61, 58, 57, 64, 59, 57, 64, 58, 56, 57.
    15·2 answers
  • What is the value of r?
    14·2 answers
  • The table represents a linear function.<br> What is the slope of the function?
    13·2 answers
  • Please help as soon as possible I really need the help! Thank you
    6·1 answer
  • Jenna constructs the model to represent 3x2 11x – 4. An algebra tile configuration. 0 tiles are in the Factor 1 spot. 0 tiles ar
    14·1 answer
  • The population of a certain city can be modeled by P = 130,000(1.018)t.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!