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3 years ago

Can somebody pls help me with this assignment!

Mathematics

1 answer:

valkas [14]3 years ago

8 0

Top right it is constant 15 dollars / 3 moths

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Jake's final grade in his science class is calculated by finding the mean of his scores for six project reports. The score Jake

Yanka [14]

Let lowest possible score be x (66+ 80+ 88+ 82 +72+ x)/6=80 on solving we get ans as 92

6 0

3 years ago

What numbers does the square root of 125 fall between

attashe74 [19]

9 and 10

11 and 12

13 and 14

15 and 16

the square root of 125 is 11.18 so therefore it falls between 11 and 12

3 0

3 years ago

Read 2 more answers

How many centimeters are in 2.5 meters?

devlian [24]

Answer:

250

Step-by-step explanation:

1 meter = 100 centimeters

2.5 x 100 = 250

7 0

3 years ago

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You plan to go to a technical school, and there are two options in your city. School A will charge you $750 per semester for tui

vichka [17]

For one semester a School A-

750 + 200 = 950

For one semester at School B-
10 percent off of 1,000 is 900

School A- $950
School B- $900

3 0

3 years ago

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

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

7 0

3 years ago