Is this a good math essay?

Mathematics

1 answer:

astra-53 [7]3 years ago

7 0

Answer:

I'm just going to assume that your answer is correct since you didn't attach the question. If you are submitting this to your teacher then you are going to want to have correct spelling and grammar. The slang usage isn't professional, but if your teacher is fine with it then you should only worry about spelling. Hope this helped you!!

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Khalaf wants to know the length of a tunnel built through a mountain. To do so, he makes the measurements shown in the figure be

IRINA_888 [86]

Answer:

237.9 meters

Step-by-step explanation:

Let x represent the length of the tunnel.

Applying the Cosine Law, we have:

x² = 201² + 146² - 2*201*146*Cos(85)

x² = 61,717 - 58,692*0.0872

x² = 61,717 - 5,117.9424

x² = 56,599.0576

x = √56,599.0576

x = 237.9 m (nearest tenth)

5 0

3 years ago

What is the result of adding these two equations?

Maru [420]

{-2x + 7y = -5

{-2x - 4y = 6 | · (-1)

{-2x + 7y = -5

{2x + 4y = -6 (+)

----------------------------------

-2x + 2x + 7y + 4y = -5 + (-6)

11y = -11 | : 11

y = -1

{y = -1

{2x + 4y = -6

{y = -1

{2x + 4 · (-1) = -6

{y = -1

{2x - 4 = -6 | + 4

{y = -1

{2x = -2 | : 2

{y = -1

{x = -1

8 0

3 years ago

Which is the graph of y= cos(x-pi)

marshall27 [118]

Answer:

graph attached

Step-by-step explanation:

A graph is a pictorial representation that represent the relationship between two or more things.

Cosine function is periodic with period $2\pi$ . If the point $(x,y)$ lies on the graph, point $(x+2k\pi ,y)$ will also lie on the graph where k is any integer.