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DENIUS [597]
3 years ago
15

PLEASE HELP

Mathematics
1 answer:
densk [106]3 years ago
6 0

For this case we have that by definition, a function is of the form:

y = f (x)

So, we have the following system of equations:

y = -6x + 2\\y = -2x + 4

Equating the equations we have:

-6x + 2 = -2x + 4

Adding 2x to both sides of the equation:

-6x + 2x + 2 = 4\\-4x + 2 = 4

Subtracting 2 from both sides of the equation:

-4x = 4-2\\-4x = 2

Dividing between -4 on both sides of the equation:

x = \frac {2} {- 4}\\x = - \frac {1} {2}

Thus, the value of the variable "x" is -0.5.

Answer:

-0.5

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(a) From the histogram, you can see that there are 2 students with scores between 50 and 60; 3 between 60 and 70; 7 between 70 and 80; 9 between 80 and 90; and 1 between 90 and 100. So there are a total of 2 + 3 + 7 + 9 + 1 = 22 students.

(b) This is entirely up to whoever constructed the histogram to begin with... It's ambiguous as to which of the groups contains students with a score of exactly 60 - are they placed in the 50-60 group, or in the 60-70 group?

On the other hand, if a student gets a score of 100, then they would certainly be put in the 90-100 group. So for the sake of consistency, you should probably assume that the groups are assigned as follows:

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8 0
2 years ago
8 - 3x4 + 6/2<br><br> what’s the answer? help plz i really need help
Anastaziya [24]

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3 2/5

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8-3x4

ok well do 3x4 that is 12

so do 12 minus 8 which is 4. and 4 as a fraction is 2/5 so

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which is.....

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3 and 2/5

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3 years ago
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