3 years ago

2 1/5 divided by 5/6

Mathematics

1 answer:

Gnesinka [82]3 years ago

8 0

Answer:

2 11/25

Step-by-step explanation:

I hope this helps :)

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Solve using quadratic formula x squared -2x-8=0

Aleks [24]

$x= \frac{-b\pm \sqrt{b^2-4ac} }{2a}$ for the equation $ax^2+bx+c$

Your question is $x^2-2x-8=0$

So $a=1 \\b=-2\\c=-8$

So plug in your numbers:
$x= \frac{-(-2)\pm \sqrt{(-2)^2-4(1)(-8)} }{2(1)}$

Simplify:
$x= \frac{2\pm \sqrt{4-(-32)} }{2}$

Simplify a little more:
$\frac{2\pm6}{2}$

So our answer is<u />
$x= \frac{2+ 6 }{2} = 4\\x= \frac{2- 6 }{2}=-2$

So $x=4, x=-2$

8 0

4 years ago

Read 2 more answers

Can someone please answer. There is one problem. There's a picture. Thank you!

expeople1 [14]

Here you have the solution to this task.

5 0

4 years ago

Find the area of the circle if the square has an area of 900 in2. Give your answer in terms of pi

shusha [124]

There is no attached picture, but I guess it is like the one I attached.
If so, the first thing is finding the side measure:
$A_{square}=l^2 \\ l= \sqrt{A} = \sqrt{900} \;\;\Rightarrow l=30\;in$
Now, radius is half this measure: 15 in.
And circle area is:
$A_{circle}=\pi r^2=\pi\cdot(15)^2\:\;\Rightarrow A_{circle}=225\pi\;in^2$