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IrinaK [193]
2 years ago
15

Help statisticsno spam​

Mathematics
1 answer:
sashaice [31]2 years ago
4 0

Answer:

<u>P = 20</u>

Step-by-step explanation:

<u>Mean</u>

  • 18.75 = 10(5) + 15(10) + P(7) + 25(8) + 30(2) / 32
  • 18.75 × 32 = 50 + 150 + 7P + 200 + 60
  • 600 = 460 + 7P
  • 7P = 140
  • <u>P = 20</u>
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If f(x)=3 x -1 and g(x)=0.03x^3-x+1 an approximate solution for the equation f(x)=g(x) is
lubasha [3.4K]

Answer:

  x ≈ {-11.789, +0.501, 11.288}

Step-by-step explanation:

The cubic g(x) - f(x) = 0 has three real solutions. It can be rewritten as ...

  g(x)-f(x)=0\\\\0.03x^3-x+1-(3x-1)=0\\\\0.03x^3-4x+2=0

Since the solutions are irrational, they are best found using a spreadsheet or graphing calculator. My favorite graphing calculator shows the approximate solutions below.

_____

<em>Comment on the problem statement</em>

Your expression for f(x) is ambiguous in that many Brainly questions have the exponentiation indicator replaced by a blank: 3 x -1 often means 3^x -1 and sometimes means 3^(x-1). We have taken the expression at face value and have assumed it is a linear expression. If otherwise, the problem is basically worked the same way: write a function h(x) = g(x) - f(x) and look for solutions to h(x) = 0. Graphing can be useful.

3 0
3 years ago
Jenna bought a bike for $200. The value of the bike decreases by 5% each year. Write an equation to model the situation.
bazaltina [42]

I'm not sure if this is correct.

200/5x

8 0
2 years ago
Read 2 more answers
Use the diagram shown. If BC = 14, AB = 11, and the perimeter of triangle ABC is 39, then what is the value of BD?
RUDIKE [14]

Answer:

BD=5.5

Step-by-step explanation:

11 divided by 2 gives you the answer

7 0
3 years ago
Description of how a diagram<br> can help you solve 2 x 40.
Gwar [14]

Answer:

2 x 40 is = 80

Step-by-step explanation:

i hope that helps

5 0
2 years ago
Plz help I had no idea these things even existed...
GrogVix [38]
X/12=(2 1/3)/5  note that 2 1/3=7/3

x/12=(7/3)/5

x/12=7/15  multiply both sides by 12

x=84/15

x=28/5

x=56/10

x=5.6
4 0
2 years ago
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