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
IrinaK [193]
3 years ago
9

There are 70 students in the school band. 40% of them are sixth graders, 20% are seventh graders, and the rest are eighth grader

s.
How many sixth graders, how many seventh graders and how many eighth graders?
Mathematics
1 answer:
guajiro [1.7K]3 years ago
7 0

Answer:

Sixth graders: 14

Seventh graders: 28

Eighth graders: 28

Step-by-step explanation:

To solve this you just have to use a rule of three to solve the percentages, remember that the 100% will be the 70 students, and we solve each case separetly:

70 students= 100%

sixth grades=   40%

Sixth grades= (40*70)/100

Sixth graders= 28

70 students= 100%

seventh grades=   20%

seventh graders=   (20*70)/100

Seventh graders=14

So if we have that the rest of the students are eighth graders, we just add up the sixth and seventh graders and withdraw them from the total:

28+14=42

70-42=28

SOwe have that the eighth graders are 28

You might be interested in
Complete the equation of the line through (6,−6) and (8,8)
vlabodo [156]
Gradient =(y1-y2) / (x1-x2)
(-6-8)/(6-8)
:7

y:mx+c
8:7(8)+c
c:-48
y:7x-48
7 0
3 years ago
Monica made a drawing of her patio using the scale 1 inch equals 4 feet. The length of the patio in her drawing was 11 inches. W
kow [346]

1 inch = 4 feet

11 inches = 44 feet (multiply both sides by 11)

<h3>Answer: 44 feet</h3>
6 0
3 years ago
Heeeelp meeee guys plis :)
scoundrel [369]

Answer + Step-by-step explanation:

This is a three degree function

(by the image A and B can't be right)

8 0
2 years ago
What is the area of this trapezoid?
son4ous [18]
Its C)126in I think because top base is 16, bottom base is 12 and the height is 9. 

5 0
3 years ago
What is the result when the number is 72 is decreased by 44%. Round your answer to the nearest tenth?
Sonbull [250]
The answer is 164 I believe
4 0
3 years ago
Other questions:
  • Which decimal is equal to four-fifths? 0.6 0.8 0.2 0.3 0.4
    7·1 answer
  • Find two consecutive intergers whose sum is 45
    10·2 answers
  • Fifteen new students are to be evenly distributed among three classes. Suppose that there are three whiz-kids among the fifteen.
    7·1 answer
  • What is the midpoint of OA ?
    12·1 answer
  • The average cost of an IRS Form 1040 tax filing at Thetis Tax Service is $157.00. Assuming a normal distribution, if 70 percent
    10·1 answer
  • My question is <br> 2+2/4*10
    12·2 answers
  • If r = 12 units and h = 8 units, then what is the volume of the cylinder shown above?
    15·1 answer
  • | x - 2| = | 4 + x |
    15·1 answer
  • Which of the expressions below are equal to 3x + 9y + 15? Select all that apply.
    12·1 answer
  • During a flood, James used two pumps to get the water out of his
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!