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satela [25.4K]
2 years ago
11

Help!! Will award brainliest! (if correct)

Mathematics
1 answer:
galina1969 [7]2 years ago
3 0

In the half-angle formula for sine and cosine, notice that a plus/minus sign appears in front of each radical (square root). Whether your answer is positive or negative depends on which quadrant the new angle (the half angle) is in

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1. (4x-3)(3x^2+8x-5)
lesya [120]
Here, you have to foil the equation. 

Distribute 4x to all sides, then distribute the -3 to all sides. Next, combine like terms. If you do this, your answer will be

12x^3+23x^2-44x+15
6 0
3 years ago
How many 7 digit phone numbers are there assuming the first digit can't be a 0 or a 1?
Anettt [7]
The first digit can be any one of the numbers 2-9 That a total of 8 numbers.

The next 6 digits can be any permutation of 6  from the numbers  0 to 9.
(10 numbers)

nPr  =  n! / r!

so here we have  10P6  = 10! / 6!  =  10*9*8*7  =  5040

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7 0
3 years ago
How to write a quadratic form vertex form to standard form
sineoko [7]
Www.virtualnerd.com/algebra-2/quadratics/transforming-functions/vertex-form/convert-vertex-to-standa...

This will help you find what your looking for 
5 0
2 years ago
−3⋅f(−8)+7⋅g(2)= <br><br> I need help!
Eva8 [605]

Answer:

I think it would be 24 f + 14 g

3 0
3 years ago
Don’t know the answer to this question???
Eva8 [605]

9514 1404 393

Answer:

  (b)  9

Step-by-step explanation:

The product of segment lengths to the near and far intersection with the circle is the same for both secants.

  4(4+5) = 3(3+x) . . . . the above statement with numbers filled in

  36 = 9 +3x . . . . . . . simplify

  12 = 3 +x . . . . . . . . divide by 3

  9 = x . . . . . . . . . . . subtract 3

3 0
3 years ago
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