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2 years ago

Simplify the expressioh 6.9-(-5)+4.1

Mathematics

1 answer:

Vadim26 [7]2 years ago

8 0

Answer:

Step-by-step explanation:

6.9-(-5)+4.1

When we subtract negatives, it is like adding positives

6.9 +(5)+4.1

11.9 + 4.1

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Work out the angle of elevation from the

insens350 [35]

$\quad \huge \quad \quad \boxed{ \tt \:Answer }$

$\qquad \tt \rightarrow \:Angle \:\: of \:\: elevation= 30°$

____________________________________

$\large \tt Solution \: :$

Let the angle of elevation be " x "

$\qquad \tt \rightarrow \: \cos(x) = \dfrac{9 \sqrt{3} }{18}$

$\qquad \tt \rightarrow \: \cos(x) = \dfrac{ \sqrt{3} }{2}$

$\qquad \tt \rightarrow \: x = \cos {}^{ - 1} \bigg( \cfrac{ \sqrt{3} }{2} \bigg )$

$\qquad \tt \rightarrow \: x = 30 \degree \: \: or \: \: \cfrac{ \pi}{6} \: \: rad$

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2 years ago

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2 years ago

Andy is buying a new laptop computer. The store is offering a 15% discount on the model he wants. Andy also has a certificate fr

nika2105 [10]

Answer:

$899.15

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Step-by-step explanation:

To find the purchase total, multiply the price by the percent paid and subtract the certificate.

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The composite function is 0.85(1199) - 120.

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2 years ago

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3. Which expressions are equivalent to the given one?

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Answer:

b, d

Step-by-step explanation:

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1 year ago