I think it should be D because if you look it is kind of common sense on how a triangle should look you should draw it out
Answer:
its 4
Step-by-step explanation:
I’m assuming what you’re asking here is how to *factor* this expression. For that, let’s rearrange the expression into a more familiar form:
-c^2-4c+21
From here, we’ll factor out a -1 so that we have:
-(c^2+4c-21)
Let’s focus on the quadratic expression inside the parentheses. To find our factors (c + x)(c + y), we’ll need to find two terms x and y that multiply together to make -21 and add together to make 4. It turns out that the numbers -3 and 7 work out perfectly for that purpose (-3 x 7 = -21 and 7 + (-3) = 4), so substituting them in for x and y, we have:
(c + (-3))(c + 7)
(c - 3)(c + 7)
And adding back on the negative from a few steps earlier:
-(c - 3)(c + 7)
(-6,0) is the ordered pair for this solution, you might want to double check though
The <em><u>correct answer</u></em> is:
1.5% of the scores, or 3 people.
Explanation:
A z-score tells the number of standard deviations a data point is from the mean. Since Bob's score is 2.17 standard deviations above the mean, that means his z-score is 2.17.
Using a z-table, we find the probability that a score would be to the left of, or less than, this value. In the table, this is 0.9850. However, we are interested in the number of people that scored <em>higher</em> than Bob. This means we subtract this from 1:
1-0.9850 = 0.015.
This is the percentage of people that scored higher than Bob. To convert to a percent, multiply by 100:
0.015*100 = 1.5.
To find the number of people that scored higher than Bob, take 1.5% of 200:
0.015(200) = 3.
