The slope m of a line
through points
and
is given by :<span>
Thus, the slope of the line passing through points </span><span>(−1, 7) and (2, 10) is
</span>
<span>
The equation of a line with slope m passing through a point P(a, b) is given by
(y-b)=m(x-a).
We can consider any of the points (-1, 7), or (2, 10). Let's choose (2, 10):
y-10=1(x-2)
y-10=x-2
y-x=-2+10
y-x=8
Answer: </span><span>C. −x+y=8</span>
Answer:
2461.8 in²
Step-by-step explanation:
Area of a circle = r²π
Using r=28 and π=3.14:
Area = 28²×3.14 ≈ 2461.8 in² rounded to the nearest tenth (ans)
Answer: 3 red bricks and 4 grey bricks
<u>Step-by-step explanation:</u>
You have 17 kg total with weights of 3 kg and 2 kg.
Since 17 is an odd number, subtract one 3 kg weight to get an even #.
17 - 1(3 kg) = 14
14 ÷ 2 kg = 7
One 3 kg weight results in seven 2 kg weights = 8 total weights.
Since the given problem states that there are only seven weights, my guess was not correct.
Try Again:
Since we need and odd number of 3 kg weights, try three 3 kg weights
17 - 3(3 kg) = 8
8 ÷ 2 kg = 4
Three 3 kg weights and four 2 kg weights = 7 total weights. 
Note that this can be solved mathematically using a system of equations:
Weight: 3r + 2g = 17
Quantity: r + g = 7
Answer: 56
Step-by-step explanation:
The perimeter is just adding up all of the sides and we know an octagon has 8 sides, so you can just do 8 by 7 which is 56.
To the best of my knowledge, this is what I gather the table's values mean:
"antibodies present" and "positive" give you the percent of people who had the antibodies and the tests showed they did (hence, positive).
"antibodies present" and "negative" give you the percent of people who did have the antibodies, yet the tests read otherwise (misdiagnosed, negative when it should be positive).
"antibodies not present" and "positive" also show a percentage of people who were misdiagnosed. these people did not have the antibodies yet they tested positive for them.
"antibodies not present" and "negative" show the percent of people who did not have the antibodies and who were tested to prove just that.
