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Andrej [43]
3 years ago
14

2x + 3y =12 Complete the missing value in the solution to the equation (blank, 8)

Mathematics
1 answer:
blondinia [14]3 years ago
8 0

Answer:

(-6, 8)

Step-by-step explanation:

2x + 3(8)= 12

2x + 24 = 12

      -24    -24   (subtract 24 from both sides)

2x = -12

x= -6

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Find the mean of the data summarized in the given frequency distribution. Compare the computed mean to the actual mean of 47.3 m
Marta_Voda [28]

Answer:

\bar X = \frac{2276}{48}=47.417

If we compare this value with the 47.3 proposed we have the following error

Error = \frac{|Actual-real|}{real}*100 = \frac{|47.417-47.3|}{47.3}*100 =0.247\%

The computed mean is close to the actual mean because the difference between the means is less than 5%.  

Step-by-step explanation:

Assuming the following dataset:

Speed   42-45  46-49  50-53  54-57  58-61

Freq.         21        15        6           4          2

And we are interested in find the mean, since we have grouped data the formula for the mean is given by:

\bar X = \frac{\sum_{i=1}^n x_i f_i}{\sum_{i=1}^n f_i}

And is useful construct a table like this one:

Speed     Freq    Midpoint   Freq*Midpoint

42-45       21            43.5       913.5

46-49       15            47.5        712.5

50-53       6             51.5         309

54-57        4            55.5         222

58-61        2             59.5        119

Total       48                           2276

And the mean is given by:

\bar X = \frac{2276}{48}=47.417

If we compare this value with the 47.3 proposed we have the following error

Error = \frac{|Actual-real|}{real}*100 = \frac{|47.417-47.3|}{47.3}*100 =0.247\%

The computed mean is close to the actual mean because the difference between the means is less than 5%.  

6 0
3 years ago
Question 8 (5 points)<br> Simplify (tanx- secx) (tanx+ secx).<br> 1 <br> -1<br> sec^2xtan^2x<br> 0
Bond [772]

Answer:

-1.

Step-by-step explanation:

(tanx- secx) (tanx+ secx).

= tan^2 x + tanx sec x- tanx sec x - sec^2x

= tan^2 x - sec^2 x.

But sec^2 x = 1 + tan^2 x

so tan^2 x - sec^2 x = -1

4 0
3 years ago
Read 2 more answers
How is Input different from Output ? ( List at least 2 examples for Input and at least 2 for Output)
emmainna [20.7K]

Answer:

Input is the number you feed into the expression , and the output is what you get when the calculations are finished

3 0
2 years ago
Find the remainder when x^5-x-1 is divided by (x-1)(x-2)<br>​
Elina [12.6K]

Answer:

ldk Sry

Step-by-step explanation:

6 0
3 years ago
What is a theoretical and Experimental Probability?
aniked [119]

Answer:

See below...

Step-by-step explanation:

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This isn't guaranteed to happen though, that's where experimental probability comes form.

Experimental probability is the number of desired outcomes achieved, divided by the total number of outcomes.  This is based on what actually happened.  Say you selected a marble, and put it back 10 times, recording the color each time and you got 2 blue marbles.  Your experimental probability is

2/10, or 1/5, which doesn't match the theoretical probability.  The more times this experiment is conducted, the closer your result will be to the theoretical probability

8 0
3 years ago
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