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3 years ago

12

A number with a negative exponent can always be written using positive exponents in fraction form. the numerator will always be

___
please finish the sentence

1 answer:

Elena-2011 [213]3 years ago

8 0

Answer:

1

Step-by-step explanation:

i did this in 8th grade so last year. trust me

can i get brainlest

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3 years ago

In ABC, a = 13,b=21, and c = 27. Find mA.

coldgirl [10]

Answer:

Step-by-step explanation:

a = 13 ; b = 21 ; c = 27

S = (a + b + c)/2

$= \dfrac{13+21+27}{2}\\\\=\dfrac{61}{2}\\\\= 30.5$

s- a = 30.5 - 13 = 17.5

s - b = 30.5 - 21 = 9.5

s -c = 30.5 - 27 = 3.5

Area = $\sqrt{s(s-a)(s-b)(s-c)}$

$= \sqrt{30.5*17.5*9.5*3.5}\\\\=\sqrt{17747.1875} \\\\=133.21\\\\=133$

$\dfrac{cbSin \ A}{2}=133\\\\\dfrac{27*21*Sin A}{2}=133\\\\Sin \ A = \dfrac{133*2}{27*21}\\\\Sin \ A = 0.4691\\\\A = Sin^{-1} \ 0.4691\\\\\\$

A = 27°

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3 years ago

Can someone explain a justification of each step? I was absent for a while so I'm behind. Thank you.

AysviL [449]

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Step-by-step explanation:

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4 years ago

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Sergio039 [100]

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