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1 year ago

For every 2 girls in Mr Hegarty's class there are 5 boys. What is the ratio of girls to boys in the class?

Mathematics

1 answer:

Dennis_Churaev [7]1 year ago

7 0

2:5

this cannot be reduced

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You have a map of Southern California. If the distance between

Rudiy27

9514 1404 393

Answer:

18 miles

Step-by-step explanation:

The map distance and ground distance are proportional.

(distance to school)/(3 in) = (12 miles)/(2 in)

Multiplying by 3 in gives ...

distance to school = (12 miles)(3/2) = 18 miles

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2 years ago

What is the distance between -2.2 , 8.4 on a number line

leonid [27]

Answer:

10.2

Step-by-step explanation:

if u write is down with the decimals tgat and count that is what u would get also 2 plus 8 is ten and two pluse two is 41

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2 years ago

The wheel of a bike has a diameter of 27 inches. Find the circumference of the wheel. Round your answer to the nearest whole num

Readme [11.4K]

By definition, the circumference is given by:
C = 2 * pi * R
Where,
R: Radio
Substituting values we have:
C = 2 * pi * (27/2)
C = 84.82300165 in
Round to the nearest whole number:
C = 85 in
Answer:
The circumference of the wheel is:
B. about 85 inches

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3 years ago

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Prove that if sin (2 + y) = 3 sin (x - y), then tan x = 2 tany.

nignag [31]

Answer:

The proof is given below.

Step-by-step explanation:

Given: ( the correct question and ans is as follow )

sin (x + y) = 3sin ( x - y)

To Prove

tan x = 2 tan y

Proof:

$\sin (x+y) = 3\sin (x-y)$

Using the identities

$\sin (A+B) = \sin A.\cos B + \cos A.\sin B\\and\\\sin (A-B) = \sin A.\cos B - \cos A.\sin B\\$

we get

$\sin x.\cos y + \cos x.\sin y = 3(\sin x.\cos y - \cos x.\sin y)\\\sin x.\cos y + \cos x.\sin y = 3\sin x.\cos y - 3\cos x.\sin y$

Now we will take sin x . cos y to the left hand side and cos x . sin y to the right hand side,we get

$3\sin x.\cos y - \sin x.\cos y = 3\cos x.\sin y +\cos x.\sin y\\2\sin x.\cos y =4\cos x.\sin y\\\sin x.\cos y =2\cos x.\sin y \ \textrm{4 divide by 2}\\ \frac{\sin x}{\cos x} =2\times \frac{\sin y}{\cos y} \\\textrm{we know identity }\\\frac{\sin x}{\cos x} = \tan x\\\frac{\sin y}{\cos y} = \tan y\\\therefore \tan x = 2\tan y\ ...............{PROVED}$

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3 years ago

Construct Arguments For rectangles that have a constant perimeter, the length

Karo-lina-s [1.5K]

Answer:

lol

Step-by-step explanation:

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2 years ago

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