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ziro4ka [17]
2 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 band members are seventh-graders?
Mathematics
2 answers:
vichka [17]2 years ago
6 0

Answer:

The answer to your question is 14 students

Step-by-step explanation:

Data

Total students = 70

40% sixth-graders

20% seventh graders

40% eighth graders

The Number of seventh-graders = ?

Process

1.- Use proportions and cross multiplication to solve this problem

                 70 students ----------------------- 100 %

                  x                   ----------------------  20 %

                  x = (20 x 70) / 100

                  x = 1400 / 100

                 x = 14 students are seventh-graders

                  70 students --------------------- 100 %

                  x                   ---------------------   40%

                  x = (40 x 70) / 100

                  x = 2800 / 100

                  x = 28 students are sixth graders

Eighth-graders = 70 - 14 - 28

                         = 28

                 

                 

Julli [10]2 years ago
5 0

Answer:

14 students are 7th graders.

Step-by-step explanation:

Since you know 20% of 70 are seventh graders, convert 20% into a decimal and then multiply it by 70 to get 14 students:

20% = 0.2

0.2(70) = 14 seventh grade band members

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Answer:

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Step-by-step explanation:

If the table is:

x |   0           1           2           3

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It says it is a quadratic and we know the y-intercept is 0 since we have the point (0,0).

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3=a(1)^2+b(1)                                                12=a(2)^2+b(2)

3=a+b                                                           12=4a+2b

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So we are solving the system

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6=2a+b

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3-6=a-2a

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Data provided in the question:

The number of weekly hours worked :

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Now,

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<u>The given options are:</u>

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(C)the central angle measure of the sector multiplied by the area of the circle will yield the area of the sector.

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The area of the shaded sector can be determined using the formula:

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Question:

Point T, the midpoint of segment RS, can be found using the formulas x = (1/2) (6 – 2) + 2 and y = (1/2) (4 – 6) + 6. What are the coordinates of point T?

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Step-by-step explanation:

Given

x = \frac{1}{2}(6 - 2) + 2

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Required

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