3 years ago

Triangular altitude

Mathematics

1 answer:

Volgvan3 years ago

8 0

What is the question
tell me please

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D is the midpoint of CE. E has coordinates (−8, −3), and D has coordinates (2, 3). Find the coordinates of C.

zvonat [6]

$\bf ~~~~~~~~~~~~\textit{middle point of 2 points } \\\\ C(\stackrel{x_1}{x}~,~\stackrel{y_1}{y})\qquad E(\stackrel{x_2}{-8}~,~\stackrel{y_2}{-3}) \qquad \left(\cfrac{ x_2 + x_1}{2}~~~ ,~~~ \cfrac{ y_2 + y_1}{2} \right) \\\\\\ \left( \cfrac{-8+x}{2}~~,~~\cfrac{-3+y}{2} \right)=\stackrel{\stackrel{midpoint}{D}}{(2,3)}\implies \begin{cases} \cfrac{-8+x}{2}=2\\[1em] -8+x=4\\ \boxed{x=12}\\[-0.5em] \hrulefill\\ \cfrac{-3+y}{2}=3\\[1em] -3+y=6\\ \boxed{y=9} \end{cases}$

8 0

3 years ago

Help pls I'm gonna be screwed if you don't get this pls pls pls anyone who knows math well pls help me I'm gonna cry it's over d

erica [24]

Answer:

WRONG ALL

Step-by-step explanation:

3. Should be:

$- 4 \frac{7}{8} \times \frac{2}{3} \\ \\ - \frac{39}{8} \times \frac{2}{3} \\ \\ \frac{ -13}{4}$

4. Should be:

$- 3 \frac{1}{5} + - \frac{2}{3} \\ \\ - 3 \frac{3}{15} - \frac{10}{15} \\ \\ - 3 \frac{7}{15}$

I hope this helps you :)

7 0

3 years ago

Expand. Your answer should be a polynomial in standard form. (x−5)^ 2 =

SVEN [57.7K]

<span>(x−5)^ 2 = (x-5)(x-5) = x^2 - 10x + 25 (answer)</span>

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3 years ago

Help a brother out fam

inn [45]

Answer:

Step-by-step explanation:

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3 years ago

Joshua currently does a total of 8 pushups each day. He plans to increase the number of pushups he does each day by 2 pushups un

alekssr [168]

He currently does 8, and is increasing by 2, so our equation will be

2x+8=30

Subtract the 8 over

2x=22

Divide by 2 on both sides

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It will take 11 days

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3 years ago

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