3 years ago

Need help with 16, 19, 20, 21, A. B. C.

Mathematics

1 answer:

OleMash [197]3 years ago

3 0

16. .375 mi
19. 440 yards
20. 500 pounds
21. I don’t fw graphs : 3 hopes this helps sum

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Step-by-step explanation:

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2 years ago

PLZ HELP

Alex

Answer:

The correct option is C ) 109.5°

Therefore,

$m\angle E=109.5\°$

Step-by-step explanation:

Given:

In Triangle DEF

d = 10

e = 18

f = 12

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angle E = ?

Solution:

In Triangle DEF , Cosine Rule says

$\cos E=\dfrac{f^{2}+d^{2}-e^{2}}{2fd}$

Substituting the values we get

$\cos E=\dfrac{12^{2}+10^{2}-18^{2}}{2\times 12\times 10}$

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