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gayaneshka [121]
3 years ago
10

2cos^2x+3cosx-2=0 ...?

Mathematics
1 answer:
VARVARA [1.3K]3 years ago
3 0
Its like a polynomial.
 
cosx=x

so it'll be like

2x^2+3x-2=0

<span>(2x−1)(x+2)
</span>
which makes your life easy because you do not have to solve cos(x)=−2 because it cannot be, so only solve cos(x)=1/2
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-3 - 6(4x+6) = -11<br> What is x?
Thepotemich [5.8K]

Answer:

x=-7/6

alternate form-x=-1 1/6

3 0
3 years ago
X+2y=5 whats the x-intercept
Ierofanga [76]
To find the x-intercept, substitute in 0 for y and solve for x.<span>x−2⋅0=5

</span>Multiply <span><span>−2</span><span>-2</span></span> by <span>00</span> to get <span>00</span>.<span><span>x+0=5</span><span>x+0=5</span></span>Add <span>xx</span> and <span>00</span> to get <span>xx</span>.<span>x=<span>5

</span></span>To find the y-intercept, substitute in 0 for x and solve for y.<span><span>(0)</span>−2y=<span>5

</span></span>Solve the equation.<span>y=−<span><span>5/2</span></span></span>
4 0
4 years ago
Identify the sequence as arithmetic, geometric, or neither.
Andreyy89
B. Geometric shapes with a black or black white black black
6 0
3 years ago
How many different ways can the letters of “football” be arranged
makvit [3.9K]
<h3>Answer:   10,080</h3>

Explanation:

There are 8 letters so there are 8! = 8*7*6*5*4*3*2*1 = 40,320 permutations of those letters. However, the letters "O" and "L" show up twice each, so we must divide by 2! = 2*1 = 2 for each instance this happens.

So,

(8!)/(2!*2!) = (40,320)/(2*2) = (40,320)/4 = 10,080

is the number of ways to arrange the letters of "football".

The reason we divide by 2 for each instance of a duplicate letter is because we can't tell the difference between the two "O"s or the two "L"s. If there was a way to distinguish between them, then we wouldnt have to divide by 2.

3 0
3 years ago
Find the volume of the rectangle prism shown below. 3cm 7cm 5cm
Lelechka [254]
105 cubic centimeters
6 0
4 years ago
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