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velikii [3]
3 years ago
7

12n²-4mn factorise completely

Mathematics
1 answer:
Taya2010 [7]3 years ago
8 0

Answer:

4n (3n - m)

Step-by-step explanation:

See what they both have, pull it to the outside, put what is left inside.

4n (3n - m)

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Mariain buys a dress that costs 32 dollars she pays 10 percent sales tax
jeyben [28]

Answer:

the total cost would be $45.2

8 0
3 years ago
Use the sum and difference identities to find the exact values of the sine, cosine, and tangent of the angle. . 165 = 135 + 30
Serhud [2]
So lets get to the problem 

<span>165°= 135° +30° </span>

<span>To make it easier I'm going to write the same thing like this </span>
<span>165°= 90° + 45°+30° </span>

<span>Sin165° </span>
<span>= Sin ( 90° + 45°+30° ) </span>
<span>= Cos( 45°+30° )..... (∵ Sin(90 + θ)=cosθ </span>
<span>= Cos45°Cos30° - Sin45°Sin30° </span>

<span>Cos165° </span>
<span>= Cos ( 90° + 45°+30° ) </span>
<span>= -Sin( 45°+30° )..... (∵Cos(90 + θ)=-Sinθ </span>
<span>= Sin45°Cos30° + Cos45°Sin30° </span>


<span>Tan165° </span>
<span>= Tan ( 90° + 45°+30° ) </span>
<span>= -Cot( 45°+30° )..... (∵Cot(90 + θ)=-Tanθ </span>
<span>= -1/tan(45°+30°) </span>
<span>= -[1-tan45°.Tan30°]/[tan45°+Tan30°] </span>

<span>Substitute the above values with the following... These should be memorized </span>
<span>Sin 30° = 1/2 </span>
<span>Cos 30° =[Sqrt(3)]/2 </span>
<span>Tan 30° = 1/[Sqrt(3)] </span>
<span>Sin45°=Cos45°=1/[Sqrt(2)] </span>
<span>Tan 45° = 1</span>
4 0
4 years ago
A football is kicked at an angle of 25 degrees and travels 50 yards. if the football is kicked at the same speed, what other ang
jasenka [17]
I would say 155° Since It's basically the same angle but towards the opposite side. YOU'RE WELCOME:D
3 0
3 years ago
Plz help me -1/8(-2x-1)
baherus [9]

Answer:

1/4x+1/8

Step-by-step explanation:

-1/8(-2x-1)

=1/4x+1/8

6 0
3 years ago
Read 2 more answers
Point F is on circle C.
Mama L [17]

the answer is 17.5 units

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3 years ago
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