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
leva [86]
3 years ago
15

in the month of November a dance troupe had 150 members. In December there was a 20% decrease in the members. In January there w

as a 20% increase from the month before. How many members were in January?
Mathematics
1 answer:
Marat540 [252]3 years ago
8 0
Hello!
When I do something with percentages I always look at it as if it was a fraction. When there is a decrease of 20%, it means that you keep 80 percent of the 100 percent, so 80/100. To calculate this, we devide 150 by 100 (1.5) and then multiply by 80 (120)

We do the same thing for January, only this is an increase, so 120 percent. the fraction is 120/100. 120 (where we left off) divided by 100 (1.2) times 120 is 144 members, this is your answer!

Hope this helped you!
You might be interested in
In the united states , 13 out of every 20 cans are recycled what percent of cans are recycled
WARRIOR [948]

Answer:

75%

Step-by-step explanation:

3 0
3 years ago
Evaluate the expression when b= -2, b2 +6b +9
Tema [17]

Answer:

1

Step-by-step explanation:

b= -2, b2 +6b +9

=-2(2)+6(-2)+9

=-4-12+9

=4+9-12

=13-12

=1

4 0
3 years ago
At a party, 75% of the people are adults and 25% are children. What is the simplest ratio of adults to children?
mr_godi [17]

0.3:0.1

Step-by-step explanation:

first convert the % to decimals.

75%=0.75

25%=0.25

then look for a common factor and divide be that, in this case its 5.

0.75/5=0.15

0.25/5=0.5

now since these arent in the simplified form, you gotta divide again by 5.

0.15/5=0.3

0.5/5=0.1

3 0
1 year ago
Write a word phrase for each algebraic expression. <br> 25-0.6x<br> 2/3y+4<br><br> 10 points
umka2103 [35]

Answer:

  • 60 percent of a number subtracted from 25
  • 4 more than 2/3 of a number

Step-by-step explanation:

"60 percent of a number subtracted from 25" is a phrase that translates into 0.6 for 60% and "of a number" as 0.6x. Take this number and its subtracted from 25: 25-0.6x.

"4 more than two thirds of a number" is a phrase that translates into addition for "4 more" and multiplication with "two thirds of a number". This means 4 + 2/3y.

8 0
3 years ago
Find an equation for the perpendicular Bisector of the line segment whose endpoints are (-9,-8) and (7,-4
Alina [70]

equation for the perpendicular Bisector of the line segment whose endpoints are (-9,-8) and (7,-4)

Perpendicular bisector lies at the midpoint of a line

Lets find mid point of  (-9,-8) and (7,-4)

midpoint formula is

\frac{x_1+x_2}{2} ,\frac{y_1+y_2}{2}

\frac{-9+7}{2} ,\frac{-8+-4}{2}

midpoint is (-1, -6)

Now find the slope of the given line

(-9,-8) and (7,-4)

slope = \frac{y2-y1}{x2-x1} = \frac{-4-(-8)}{7-(-9)}

slope = \frac{-4+8}{7+9}= \frac{4}{16} =\frac{1}{4}

Slope of perpendicular line is negative reciprocal of slope of given line

So slope of perpendicular line is -4

slope = -4  and midpoint is (-1,-6)

y - y1 = m(x-x1)

y - (-6) = -4(x-(-1))

y + 6 = -4(x+1)

y + 6 = -4x -4

Subtract 6 on both sides

y = -4x -4-6

y= -4x -10

equation for the perpendicular Bisector y = -4x - 10


3 0
3 years ago
Other questions:
  • Does a rotation of 180 degrees preserves a figure's orientation?
    12·1 answer
  • A golf ball is dropped from a height of 30 ft to the pavement, and the rebound is one fourth the distance it drops. if after eac
    10·1 answer
  • R=1+3w÷2 solve for w
    14·1 answer
  • Select from the given unit rates to match with each quantity
    8·1 answer
  • Estimate 8/9 + 4/7<br> Sum or difference
    6·1 answer
  • The answer i don't understand ​
    11·2 answers
  • A problem is given below. Instead of trying to solve that problem, state a simpler problem and solve it instead Thirteen people
    13·1 answer
  • Convert 4 years to months​
    9·2 answers
  • There are 80 cupcakes to be sold at school for a
    7·1 answer
  • Given the line below.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!