3 years ago

Which expression has a positive value?

1 answer:

7 0

Answer:

(negative 5) (negative 9)

Step-by-step explanation:

minus×minus=plus

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notsponge [240]

What else do you need help with

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kvasek [131]

Among many other formulas, the area of a triangle is

$S = \frac 1 2 a c \sin B$

where B is the angle between sides a and c.

$S=\frac 1 2(10)(20) \sin 67^\circ \approx 92.05 \textrm{ sq cm}$

Answer: 92.05 sq cm, first choice

Bonus. Here's a formula for the area S of a triangle your teacher doesn't know:

$16S^2 = 4a^2b^2 -(c^2-a^2-b^2)^2=(a^2+b^2+c^2)^2-2(a^4+b^4+c^4)$

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Oxana [17]

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Step-by-step explanation:

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UkoKoshka [18]

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JulsSmile [24]

The estimated distance is 1,000 for each trip....the exact distance is 1,075.

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