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Bond [772]
2 years ago
11

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.
What percentage of the band members are eighth graders?
Mathematics
2 answers:
8090 [49]2 years ago
8 0

Answer:

40%

Step-by-step explanation:

40% of 70 is 28

20% of 70 is 14

so there are 28 8th graders 28 is 40% of 70

Also, #SPEEDRUN

Alenkinab [10]2 years ago
7 0

Answer:40%

Step-by-step explanation:

lets just forget the number 70 because it wont change anything in this story problem

there must be the value 100% which equals the 70 students

the problem told that 40% of them are sixth graders while 20% are seventh and the rest are eighth so

100-(40+20)=40

if you didnt get it here another way:

40%+20%=60% which is the percentage of seventh and sixth graders together

the rest of the 100% is the eighth so you should subtract the 60% from the 100% which is "40%"

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We have a study involving 5 different groups that each contain 9 participants (45 total). What two degrees of freedom would we r
vivado [14]

Answer:

Degree of freedoms F(4,40)

Step-by-step explanation:

Given:

There is a study which is involving 5 different groups that each contains 9 participants (totally 45)

The objective is to calculate the degree of freedoms

Formula used:

Numerator degree of freedom = k-1

denominator degree of freedom=N-K

Solution:

Numerator degree of freedom = k-1

denominator degree of freedom=N-K

Where,

K= number of groups = 5

N= total number of observations

which is given as follows,

N=45

Then,

Numerator degree of freedom = k-1

=5-1

=4

Denominator degree of freedom = N-K

=45-5

=40

Therefore,

Degree of freedoms, F(4,40)

7 0
2 years ago
I need help asap! for a few questions of mine!
natka813 [3]

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4 0
3 years ago
Which answer is in slope-intercept form for the given equation?
zhuklara [117]

The slope-intercept form:

y = mx + b

m - slope

b - y-intercept

Answer:

B. y = 4/9x + 4

slope = 4/9, y-intercept = 4

D. y = -4/9x - 4

slope = -4/9, y-intercept = -4

6 0
3 years ago
How many gallons of a 80​% antifreeze solution must be mixed with 100 gallons of 20​% antifreeze to get a mixture that is 70​% a
Blababa [14]

To Find :

How many gallons of a 80​% antifreeze solution must be mixed with 100 gallons of 20​% antifreeze to get a mixture that is 70​% antifreeze.

Solution :

Let, x gallons of 80​% antifreeze solution is required :

So,

(x \times 80) + ( 100 \times 20 ) = (x + 100 )\times 70\\\\8x + 200 = 7( x + 100)\\\\x = 500

Therefore, 500 gallons of 80% antifreeze solution is required.

6 0
2 years ago
what is the probability of having one girl and three boys in a 4 child family assuming boys and girls are equally likely
lara31 [8.8K]
The possibilities are:

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This shows that there is a 1 in 4 chance of having three boys and one girl

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