13x - 23 - 45 = 7x + 12
2 answers:
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Answer:
0.3745
Step-by-step explanation:
Data
mean (): 80
standard deviation (): 4
Normal distribution table is in figure attached .
Z = (85 - 80)/4 = 1.25
Area below curve = 0.3944
Z = (82 - 80)/4 = 0.5
Area below curve = 0.0199
Proportion of exam scores between 82 and 85?
0.3944 - 0.0199 = 0.3745
Answer:
" for every integer
"
Step-by-step explanation:
The function has zeroes at the x-intercepts in the graph.
If you look at the graph from 0 to , you will see that the graph cuts the x-axis at 4 points.
They are at half of , which is
, at
, at half point between
and
, which is at
, and at
.
They are basically all multiples of .
Looking at the answer choices, the third choice is correct.
Plugging in k=1, k=2, k=3, and k=4 into the equation, we see that the zeroes are exactly what we saw. Also, the negative side of the function holds true as well.
Third answer choice is right.