3 – (–3) + 7 – 4 =

Mathematics

2 answers:

Zanzabum3 years ago

8 0

Answer:

Step-by-step explanation:

3–(–3)+7–4=

=3+3+7-4

=6+7-4

=13-4

I hope this helps!

Sergio039 [100]3 years ago

7 0

Answer:

3−(−3)+7−4

Answer is B

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Find the focus. y= -1/12 (x)² - 6

jolli1 [7]

Answer:

$\Large \boxed{\sf\ \ (0,-9) \ \ }$

Step-by-step explanation:

Hello,

We know that when the parabola equation is

$y=a(x-h)^2+k$

the vertex is (h,k) and the focus is

$(h,k+\dfrac{1}{4a})$

Here, the equation is

$y=-\dfrac{1}{12}x^2-6$

$a=-\dfrac{1}{12}\\\\h = 0\\\\k =-6$

So,

$k+\dfrac{1}{4a}=-6-\dfrac{12}{4}=-6-3=-9$

Then, the focus is

$\large \boxed{\sf\ \ (0,-9) \ \ }$

I attached the graph, included the focus so that you can see it :-)

Hope this helps.

Do not hesitate if you need further explanation.

Thank you

4 0

2 years ago

Find the midpoint between these two points (-7,-6) and (2,5) PLEASE ANSWER!

QveST [7]

$\bf ~~~~~~~~~~~~\textit{middle point of 2 points } \\\\ (\stackrel{x_1}{-7}~,~\stackrel{y_1}{-6})\qquad (\stackrel{x_2}{2}~,~\stackrel{y_2}{5}) \qquad \left(\cfrac{ x_2 + x_1}{2}~~~ ,~~~ \cfrac{ y_2 + y_1}{2} \right) \\\\\\ \left( \cfrac{2-7}{2}~~,~~\cfrac{5-6}{2} \right)\implies \left( \cfrac{-5}{2}~~,~~\cfrac{-1}{2} \right)\implies (-2.5,-0.5)$