I will give BRAINLEST TO WHO ANSWER THIS

Mathematics

2 answers:

evablogger [386]2 years ago

7 0

Answer:

Step-by-step explanation:

mixas84 [53]2 years ago

7 0

Answer:

64yd

Step-by-step explanation:

$\sqrt[]{87^{2} } - \sqrt{23^{2} } = 64yd$

hope this helps

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How many ways can a group of 8 students be selected from 9 students?

antoniya [11.8K]

9!/(8!*(9-8)!)=9
or just use a calculator and use the nCr function

7 0

3 years ago

I REALLY NEED HELP PLEASE!!

disa [49]

part A)

$\bf \begin{array}{ccllll}
hours(x)&velocity(y)\\
-----&-----\\
1&6\\
3&2
\end{array}\\\\
-------------------------------\\\\$

$\bf \begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
% (a,b)
&({{ 1}}\quad ,&{{ 6}})\quad 
% (c,d)
&({{ 3}}\quad ,&{{ 2}})
\end{array}
\\\\\\
% slope = m
slope = {{ m}}= \cfrac{rise}{run} \implies 
\cfrac{{{ y_2}}-{{ y_1}}}{{{ x_2}}-{{ x_1}}}\implies \cfrac{2-6}{3-1}\implies \cfrac{-4}{2}\implies -2$

$\bf y-{{ y_1}}={{ m}}(x-{{ x_1}})\implies y-6=-2(x-1)\\
\left. \qquad \right. \uparrow\\
\textit{point-slope form}
\\\\\\
y-6=-2x+2\implies y=-2x+2+6\implies \boxed{y=-2x+8}$

part B)

well, we know y = -2x+8.... so.. what's the runner's velocity after 5hours? well, x = 5, thus y = -2(5) +8 ---> y = -2

to graph it, well, is a LINEar equation, meaning the graph is a LINE, and to graph a line, all you need is two points, and by now, you have more than two.. so graph it away.

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2 years ago

Esther's company has been contracted to lay carpet in a room at a new observatory. The floor plan for the room is in the shape o

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