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BabaBlast [244]
3 years ago
13

What is the value of Cos105°

Mathematics
1 answer:
aleksklad [387]3 years ago
6 0

Answer:

\frac{\sqrt{2}-\sqrt{6}  }{4}

Step-by-step explanation:

A on edge

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Which expression is equivalent to -3(2m - 1) - n?
aliina [53]

The correct answer is -6m-n+3. You have to simplify the expression.

5 0
3 years ago
Algebra 2 question need help.​
MrMuchimi

Answer: Choice C

h(x) = -x^4 + 2x^3 + 3x^2 + 4x + 5

===========================================

Explanation:

When reflecting the function f(x) over the y axis, we replace every x with -x and simplify like so

f(x) = -x^4 - 2x^3 + 3x^2 - 4x + 5

f(-x) = -(-x)^4 - 2(-x)^3 + 3(-x)^2 - 4(-x) + 5

f(-x) = -x^4 + 2x^3 + 3x^2 + 4x + 5

h(x) = -x^4 + 2x^3 + 3x^2 + 4x + 5

Note the sign changes that occur for the terms that have odd exponents (the terms -2x^3 and -4x become +2x^3 and +4x); while the even exponent terms keep the same sign.

The reason why we replace every x with -x is because of the examples mentioned below

-----------

Examples:

The point (1,2) moves to (-1,2) after a y axis reflection

Similarly, (-5,7) moves to (5,7) after a y axis reflection.

As you can see, the y coordinate stays the same but the x coordinate flips in sign from negative to positive or vice versa. This is the direct reason for the replacement of every x with -x.

4 0
3 years ago
I think of a number,divide it by 4 then subtract 3. Give your answer in algebraic notation.
Vilka [71]
X/4 - 3

(*make sure to write the division in fraction form as shown for algebraic notation)
5 0
3 years ago
Simon pays $9 for 6 visits to swim at the community pool. He pays $18 for 12 visits to swim. How much does it cost for each visi
sergij07 [2.7K]

Answer:

$1.50

Step-by-step explanation:

If you do cost per quantity you would get $9 over 6 visits. Then you divide both sides by 6 because to get to one by 6 it's 6 so when you divide both sides by 6 you would get 1.5 over 1 and all you do is add a zero because you're dealing with money

Hope this helps :)

8 0
3 years ago
Can someone explain how to solve the system of equation x+y=3 by graphing?
Bess [88]

Answer:

its not possible


Step-by-step explanation:


5 0
3 years ago
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