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Greeley [361]
4 years ago
9

What is the slope 19,-16 -7,-15

Mathematics
1 answer:
zubka84 [21]4 years ago
5 0
\bf \begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
%   (a,b)
&({{ 19}}\quad ,&{{ -16}})\quad 
%   (c,d)
&({{ -7}}\quad ,&{{ -15}})
\end{array}
\\\\\\
% slope  = m
slope = {{ m}}= \cfrac{rise}{run} \implies 
\cfrac{{{ y_2}}-{{ y_1}}}{{{ x_2}}-{{ x_1}}}\implies \cfrac{-15-(-16)}{-7-19}\implies \cfrac{-15+16}{-7-19}
\\\\\\
\cfrac{1}{-26}\implies -\cfrac{1}{26}
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Roman55 [17]
I believe A is the answer
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4 years ago
Find the surface area of the cylinder in terms of pi
tia_tia [17]

Answer:

<u>A≈301.44</u>

Step-by-step explanation:

The area of a cylinder is A=2πrh+2πr^2

You first do the first problem of the equation (A=2πrh)

You fill in the radius and height ( A=2π(4)(8) )

You first multiply 4 x 8 = 32. ( A=2π(32) )

Then you multiply 2 x 32 = 64. ( A=π(64) )

Then you multiply π x 64 (using 3.14 for π) = 200.96 m^2

You then do the second part of the equation. (A=2πr^2)

You fill in the radius. (A=2π(4)^2)

Then multiply 4 x 4 = 16 (because it's to the power of 2 [4 times itself twice]) and then multiply it by 2.

16 x 2 = 32. ( A=π(32) )

Next you just multiply 32 x π (using 3.14 for π again) = 100.48 m^2.

Then you just add them together:

200.96 m^2 + 100.48 m^2 = 301.44 m^2

So <u>301.44 m^2</u> is your answer.

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5 0
3 years ago
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Mr. Daniel recorded the scores for each student in his class in the form of Stem- Leaf table. If the passing score is 33 and all
iVinArrow [24]

Answer:

9 students failed

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Step-by-step explanation:

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3 0
3 years ago
Let f(x)=ax+b and (fof)(x)=4x+8 find the possible value of a and b and also find f(x)?
hoa [83]

Answer:

\huge\boxed{f(x)=-2x-8\ \text{or}\ f(x)=2x+\dfrac{8}{3}}

Step-by-step explanation:

f(x)=ax+b\\\\(f\circ f)(x)=a(ax+b)+b=a^2x+ab+b\\\\(f\circ f)(x)=4x+8\\\Downarrow\\a^2x+ab+b=4x+8\Rightarrow a^2=4\ \wedge\ ab+b=8\\\\a^2=4\to a=\pm\sqrt4\to a=\pm2\\\\\text{for}\ a=-2:\\-2b+b=8\\-b=8\\\boxed{b=-8}\\\\\text{for}\ a=2:\\2b+b=8\\3b=8\\\boxed{b=\frac{8}{3}}

5 0
3 years ago
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