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3 years ago

Plz do this for me plz and thx will give Brainly

Mathematics

1 answer:

Stels [109]3 years ago

3 0

Probably C. 30 Hope this helps I might wrong sometimes

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9. Zane owes his dad money for his cell phone that he

ozzi

Answer:

T=45m+23

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

If a runner was traveling with a velocity of 4 m/s north and had a displacement of 2500 m, how long was he running?

Mademuasel [1]

Answer:

625

Step-by-step explanation:

t= d/s

2500/4

4 0

3 years ago

If y varies directly as x, and y=-4 when x=8, find y when x=3

enot [183]

I believe it would be negative 9 because your subtracting by twelve again. I hope that helped

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3 years ago

Type the correct answer in each box. Spell all words correctly.

pogonyaev

Answer:

Charlie is incoerre

Step-by-step explanation:

Given that :

Line of sight to top of flagpole = 16 feets

Angle of elevation = 60°

The height of the flagpole :

Applying trigonometry to the drawing in the attached picture :

We use:

Sinα = opposite / hypotenus

This enables us to use the value of the hypotenus (line of sight) to obtain the missing height value (h)

Sin(60°) = h / 16

h = 16 * sin 60

h = 16 * 0.8660254

h = 13.856406

Hence flagpole is about 13.86 feets high

Charlie's reasoning is incorrect, the line of sight constitutes the hypotenus and not Adjacent and hence, shoul

3 0

3 years ago

How do you evaluate sin(13π/12)?

Alekssandra [29.7K]

13pi/12 lies between pi and 2pi, which means sin(13pi/12) < 0

Recall the double angle identity,

sin^2(x) = (1 - cos(2x))/2

If we let x = 13pi/12, then

sin(13pi/12) = - sqrt[(1 - cos(13pi/6))/2]

where we took the negative square root because we expect a negative value.

Now, because cosine has a period of 2pi, we have

cos(13pi/6) = cos(2pi + pi/6) = cos(pi/6) = sqrt[3]/2

Then

sin(13pi/12) = - sqrt[(1 - sqrt[3]/2)/2]

sin(13pi/12) = - sqrt[2 - sqrt[3]]/2

7 0

3 years ago