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3 years ago

PLEASE ANSWER THIS ASAP !!!

Mathematics

1 answer:

grin007 [14]3 years ago

4 0

Answer:

Step-by-step explanation:

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Keeping the properties of exponents in mind, to what power must you raise the expression 7 1/2 to get 7 as a result

zhenek [66]

For this case we have the following expression:
$7 ^ {(1/2)}
$
Rewriting the expression we have:
$(7 ^ {(1/2)}) ^ x
$
Where,
x: exponent to which we must raise the expression to obtain 7 as a result.
We have then:
$7 ^ {((1/2) x)}
$
The exponent must be equal to 1:
$(1/2) x = 1
$
Clearing x we have:
$x = 2
$
Substituting valres:
$7 ^ {((1/2) 2)}

7 ^ 1

7$
Answer:
you must raise the expression to 2

7 0

3 years ago

Beth writes a number that shows 60 parts out of 100

dangina [55]

Answer:

60/100 orrrrrrrrrrrrrrrr 6/10

Step-by-step explanation:

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3 years ago

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4. Using the geometric sum formulas, evaluate each of the following sums and express your answer in Cartesian form.

nikitadnepr [17]

Answer:

$\sum_{n=0}^9cos(\frac{\pi n}{2})=1$

$\sum_{k=0}^{N-1}e^{\frac{i2\pi kk}{2}}=0$

$\sum_{n=0}^\infty (\frac{1}{2})^n cos(\frac{\pi n}{2})=\frac{1}{2}$

Step-by-step explanation:

$\sum_{n=0}^9cos(\frac{\pi n}{2})=\frac{1}{2}(\sum_{n=0}^9 (e^{\frac{i\pi n}{2}}+ e^{\frac{i\pi n}{2}}))$

$=\frac{1}{2}(\frac{1-e^{\frac{10i\pi}{2}}}{1-e^{\frac{i\pi}{2}}}+\frac{1-e^{-\frac{10i\pi}{2}}}{1-e^{-\frac{i\pi}{2}}})$

$=\frac{1}{2}(\frac{1+1}{1-i}+\frac{1+1}{1+i})=1$

2nd

$\sum_{k=0}^{N-1}e^{\frac{i2\pi kk}{2}}=\frac{1-e^{\frac{i2\pi N}{N}}}{1-e^{\frac{i2\pi}{N}}}$

$=\frac{1-1}{1-e^{\frac{i2\pi}{N}}}=0$

3th

$\sum_{n=0}^\infty (\frac{1}{2})^n cos(\frac{\pi n}{2})==\frac{1}{2}(\sum_{n=0}^\infty ((\frac{e^{\frac{i\pi n}{2}}}{2})^n+ (\frac{e^{-\frac{i\pi n}{2}}}{2})^n))$

$=\frac{1}{2}(\frac{1-0}{1-i}+\frac{1-0}{1+i})=\frac{1}{2}$

What we use?

We use that

$e^{i\pi n}=cos(\pi n)+i sin(\pi n)$

and

$\sum_{n=0}^k r^k=\frac{1-r^{k+1}}{1-r}$

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3 years ago

Graph y-4=2x and identify<br> the slope and y-intercept.

zzz [600]

Answer:

slope is 2 and y-intercept is (0, 4)

Step-by-step explanation:

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3 years ago

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9 batteries cost 13 dollars.It's ratios and Rates

8090 [49]

One battery costs $1.44.

The unit rate would be
$\frac{1.44}{1 battery}$

To get that answer, you would have to divide 13 ÷ 9.

I'm not sure if this is what you were looking for, but if it was, I hope I helped! :-)

4 0

3 years ago

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