Answer:
1. AB Is a tangent
2. AB is not a tangent
Explanation:
1. In the given figure
9.7^2 = 7.2^2 + 6.5^2
94.09 = 51.84+42.25
94.09 = 94.09
Hence, angle BAC is 90 degree.
Now any line that touches the circle at one point only and forms a 90 angle with the radius is a tangent
2. In the second figure
22^2 is not equal to 12^2 + 16^2
hence, AB is not a tangent
Answer:
1) x = 4; y = -2
Explanation:
1)
2x - y = 10;
x + y = 2
<em>In order to do the elimination process, you must find two variables (either the x values or the y values) that are the exact opposites of each other. In this case, it isn't too hard since we have 1y and -1y, so now we eliminate them.</em>
2x = 10;
x = 2
<em>Now we add up both sides, so that it turns into 1 equation.</em>
3x = 12;
<em>Now we solve for one x</em>
x = 4;
<em>Now, we use this value and input it in both of the original equations to find and check for the other value, y.</em>
2(4) - y = 10
8 - y = 10
-y/-1 = 2/-1
y = -2;
(4) + (-2) = 2
Does that help?
I would choose answer 2, since that answer is based on a same size consisting of more than 1 person, making it applicable to statistic analysis and have an input in the observational study. The other questions ask for one data point, which isn't statistical
Source: AP Statistics
