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2 years ago

Which expression is equivalent to 2cos2(x/2)-cos(x)

Mathematics

1 answer:

Pavel [41]2 years ago

3 0

Answer:

Step-by-step explanation:

Edge

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Mila Hawkins purchased a bookshelf for $210.00.

Alenkinab [10]

Answer:

$12.60

Step-by-step explanation:

6% of 210 is .06 x 210 which equals 12.60

6 0

3 years ago

Find the equation of the exponential function represented by the table below:

IgorC [24]

Answer:

$y=2^{1-x}$

Step-by-step explanation:

<u>Exponential Function</u>

When we need to express the exponential relation between two variables, we use the equation

$y=Cr^{x}$

where C, r are constants to be determined by using the given points from the table

For x=0, y=2, thus

$2=C.r^{0}=C$

We find that C=2

The equation is now

$y=2r^{x}$

Now we use the point x=1, y=1

$1=2r$

We find that

$\displaystyle r=\frac{1}{2}$

Thus, the equation is

$\displaystyle y=2\left(\frac{1}{2}\right)^{x}$

Rearranging

$y=2(2)^{-x}=2^{1-x}$

The required equation is

$y=2^{1-x}$

We can easily verify the last two points are also obtained by using the equation

7 0

3 years ago

Place the numbers in ascending order.

frutty [35]

Answer:

in question it say descending order and you say ascending order what to do ?

in deceasing order

√23

180%

1 2/7,

√49/7,

π-5

this is the correct answer

7 0

3 years ago

Please help i don’t understand

SashulF [63]

Answer:

Use inverse cos to solve for x.

hope this helps

3 0

3 years ago

3x-6y=30 solve for x

ELEN [110]

Answer:

Step-by-step explanation:

x = 10+2y

6 0

3 years ago

Read 2 more answers