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ozzi
3 years ago
15

High school students from grades 9–10 and 11–12 were asked to choose the kind of band to have play at a school dance: rap, rock,

or country.
Their choices were as follows:
Grades 9–10—Rap: 40; Rock: 30; Country: 55
Grades 11–12—Rap: 60; Rock: 25; Country: 35

Find a correct two-way frequency table for the data
Mathematics
2 answers:
yanalaym [24]3 years ago
8 0
The correct two-way frequency table for the date will look like this:
                 
                               RAP      ROCK     COUNTRY     TOTAL
Grades 9-10           40           30            55                  125
Grades 11-12         60           25            35                  120
TOTAL                    100          55            90                  245

The sum of the row total is equal to the sum of the column total
125 + 120 = 100 + 55 + 90
245 = 245
r-ruslan [8.4K]3 years ago
8 0

Answer:C

Step-by-step explanation:

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Find the derivative F(x)=(5x+3)(2x^2+1)
Lerok [7]

Answer:

10x^3 + 6x^2 + 5x + 3

Step-by-step explanation:

F(x)=(5x+3)(2x^2+1)

= 5x*2x^2 + 5x*1 + 3*2x^2 + 3*1

= 10x^3 + 5x + 6x^2 + 3

= 10x^3 + 6x^2 + 5x + 3

3 0
3 years ago
Which of the following is an expression? *
Yanka [14]

Answer:

3m

Step-by-step explanation:

An expression does not have an equals sign

An equation has an equals sign

4x = 12   equation

25 - 12 = 13   equation

7x - 3 + 2y =29   equation

3m  expression

4 0
3 years ago
Can anyone help me plz?
RUDIKE [14]

Answer:

The answer is 37

Step-by-step explanation:

8x8=64

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8 0
3 years ago
Evaluate 7 + (-3x^2) For x = 0<br><br>A. -2<br>B. 0<br>C. 4<br>D. 7​
Goryan [66]

Answer:  D. 7

Step-by-step explanation:

The problem tells you that x = 0 so replace everything that is x in the equation with 0 so the problem becomes

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Now we just solve the problem normally.

solve the problem in the parenthesis first, we must multiply -3 times 0^2 is 0

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8 0
3 years ago
HELP ME IM SO CONFUSED
givi [52]

Answer:

  • 1) 4812 students
  • 2) 763 pounds
  • 3) $30906.76

Step-by-step explanation:

1)

  • Initial number = 2988
  • Rate of increase = 10%

<u>Number of students after 6 years:</u>

  • a_6 = 2988(1+0.1)^{6-1} = 4812

2)

  • Initial number = 1200
  • Rate of decrease = 14%

<u>Amount of gold after 4 years:</u>

  • a_4=1200(1-0.14)^3 = 763

3)

  • Initial number = 28000
  • Rate of increase = 2.5%

a)

<u>Salary after n years:</u>

  • a_n=28000(1+0.025)^{n-1} = 28000*1.025^{n-1}

b)

<u>Salary in the 5th year:</u>

  • a_5=28000*1.025^4 = 30906.76
6 0
3 years ago
Read 2 more answers
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