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3 years ago

Please help, will be grateful and give brainliest!

Mathematics

1 answer:

zvonat [6]3 years ago

4 0

Answer:

x=216°

Step-by-step explanation:

100%=360°

To find 10% divide by 10

10%=36°

40%=144°

in a full circle thered 360°

360-144=216°

x=216°

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KIM [24]

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3 years ago

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A parabola has a focus of F(8.5,−4) and a directrix of x=9.5.

HACTEHA [7]

Answer:

$-\frac{1}{2}y^2-4y+1=x$

Step-by-step explanation:

A parabola has a focus of F(8.5,−4) and a directrix of x=9.5.

General form of horizontal parabola is

$(y-k)^2=4p(x-h)$

the distance between directrix and focus is the value of p

so p = 8.5 - 9.5 = -0.5

Focus is (h+p , k), given focus is (8.5, -4)

So k = -4 and h+p = 8.5

we know p = -0.5

h +p = 8.5

h - 0.5 = 8.5

so h= 9 and k = -4

vertex is (h,k) that is (9, -4)

Now plug in the value in the general equation

$(y-k)^2=4p(x-h)$ , k= -4, h= 9 , p = -0.5

$(y+4)^2=4(-0.5)(x-9)$

$(y+4)^2=-2(x-9)$

$y^2+8y+16=-2x+18$

subtract 18 on both sides

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Divide whole equation by -2

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4 0

3 years ago

Plz helps what is the value of 374 PLZ

aev [14]

473 would be it because you can simplify it into fraction then you can do it by 1 so the answer is 473 or 374

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4 years ago

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If 28% of a sum is 100.80 what is the sum

Sveta_85 [38]

$360.00*.28= 100.80

Or do a portion 

28%/100%=100.8/x 

Then cross multiply 

10080=28x 

x=360

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3 years ago

A polynomial has two terms.

alexira [117]

Not sure if that is the entire question, but yes, it does. Poly comes from the Greek polus or polloi meaning much or many.

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4 years ago