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Luda [366]
3 years ago
10

How do I do this answer please

Mathematics
2 answers:
Mashcka [7]3 years ago
5 0

Answer:

12.5

Step-by-step explanation:

(2.5 + 7.5?) /2 * 2.5 = 12.5

nydimaria [60]3 years ago
3 0
The answer should be 12.5
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What type of probability uses a knowledge of sample spaces as opposed to observations to determine the numerical probability of
Aneli [31]

Answer:

Classical probability

Step-by-step explanation:

  • Classical property is that type of probability or statistical concept that deals with the  measurement of the odds or likelihood of some event.
  • It is that form of probability that is simplest in approach and includes the equal likelihood of happening or occurrence of an event.
  • In order to determine the numerical probability of an event, it makes use of the knowledge of sample spaces in contrast with the observations.
  • It takes a proper note of an event in order to calculate its probability and also it deals with the likelihood of a certain event rather than making observations.

5 0
3 years ago
Read 2 more answers
Simplify the expression:<br><br> 3x (4x-6)<br> —————<br> 2x(3x)
Marina86 [1]

Answer:

=\frac{2x-3}{x}

Step-by-step explanation:

=6x^2\\\mathrm{Remove\:parentheses}:\quad \left(a\right)=a\\=\frac{3x\left(4x-6\right)}{2x\cdot \:3x}\\2x\cdot \:3x=6x^2\\=\frac{3x\left(4x-6\right)}{6x^2}\\\mathrm{Cancel\:}\frac{3x\left(4x-6\right)}{6x^2}:\quad \frac{4x-6}{2x}\\=\frac{4x-6}{2x}\\\mathrm{Factor}\:4x-6:\quad 2\left(2x-3\right)\\=\frac{2\left(2x-3\right)}{2x}\\\mathrm{Divide\:the\:numbers:}\:\frac{2}{2}=1\\=\frac{2x-3}{x}

7 0
3 years ago
Based on the dot plot below, what is the mean travel time to school? (Ill give brainlist)
alekssr [168]

Answer:

b) 16 minutes

Step-by-step explanation:

total travel time = 320

20 data items

mean = 320/20 = 16

8 0
3 years ago
It costs $23 per hour plus a flat fee of $16 for a plumber to make a house call. What is the equation of the form y = mx + b for
Dmitry_Shevchenko [17]

So, we just need to figure out what number means what.


So, the flat fee is $16.  This is going to be charged even for "zero" hours of work.  So, this will be the Y-intercept (also known as the B-Value)


$23 per hour means that as time progresses, you will be charged more.  23 will be our slope since it's price is dependent on time spent.  The slope is also known as the M value.


So, we just plug in our numbers and get

Y = 23x + 16

8 0
3 years ago
Read 2 more answers
In this example we modeled the world population from 1900 to 2010 with the exponential function P(t) = (1436.53) · (1.01395)t wh
Sergio [31]

Answer:

a) Rate of increase = 26.66 millions per year

b) Rate of increase = 42.64 millions per year

c) Rate of increase = 79.53 millions per year

Step-by-step explanation:

We are given that population is modeled with the exponential function:

P(t) = (1436.53).(1.01395)^t

where t = 0 corresponds to the year 1900 and P(t) is measured in millions.

Rate of increase of world population =

\displaystyle\frac{d(a^x)}{dx} = a^xln(a)\\\\P'(t) = (1436.53)(1.01395)^tln(1.01395)\\\\P'(t) = (1436.53)ln(1.01395)(1.01395)^t

a) 1920

P'(1920-1900) = (1436.53)(ln(1.01395))(1.01395)^{(1920-1900)}\\P'(20) = (1436.53)(ln(1.01395))(1.01395)^{(20)}\\P'(20) \approx 26.66

Rate of increase = 26.66 millions per year

b) 1955

P'(1955-1900)=(1436.53)(ln(1.01395))(1.01395)^{(1955-1900)}\\P'(55) = (1436.53)(ln(1.01395))(1.01395)^{(55)}\\P'(55) \approx 42.64

Rate of increase = 42.64 millions per year

c) 2000

P'(2000-1900) = (1436.53)(ln(1.01395))(1.01395)^{(2000-1900)}\\P'(100) = (1436.53)(ln(1.01395))(1.01395)^{(100)}\\P'(100) \approx 79.53

Rate of increase = 79.53 millions per year

6 0
3 years ago
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