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3 years ago

How do u answer this I'm fratiomshow do you how do you do the San Francisco

Mathematics

1 answer:

Furkat [3]3 years ago

5 0

No I do not know how to do this

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At 6 1/2¢ per pound of string beans, how much does 7 pounds cost?

sergeinik [125]

I think it would be .58 cents

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3 years ago

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Verify by direct substitution that the given power series is a solution of the indicated differential equation. [Hint: For a pow

shepuryov [24]

Answer:

The given power series $y =\sum^{\infty}_{n=0} {(-1)^n x^{2n}}$ is a solution of the differential equation (1+x^2)y' + 2xy = 0

Step-by-step explanation:

This is a very trivial exercise, follow the steps below for the solution:

Step 1: Since n = 0, 1, 2, 3, 4, ........, Substitute the values of n into equation (1) below.

$y =\sum^{\infty}_{n=0} {(-1)^n x^{2n}}$ .....................(1)

$y = 1 - x^2 + x^4 - x^6 + x^8.........$

Step 2: Find the derivative of y, i.e. y'

$y' = -2x + 4x^3 - 6x^5 + 8x^7 .............$

Step 3: Substitute y and y' into equation (2) below:

$(1+x^2)y' + 2xy = 0\\\\(1+x^2)(-2x + 4x^3 - 6x^5 + 8x^7......) + 2x(1 - x^2 + x^4 - x^6 + x^8.......) = 0\\\\-2x+ 4x^3 - 6x^5 + 8x^7........ - 2x^3 +4x^5 - 6x^7 + 8x^9 ......+ 2x - 2x^3 + 2x^5 - 2x^7 + 2x^9...... = 0\\\\0 = 0$

(Verified)

Since the LHS = RHS = 0, the given power series $y =\sum^{\infty}_{n=0} {(-1)^n x^{2n}}$ is a solution of the differential equation (1+x^2)y' + 2xy = 0

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3 years ago

Kathy makes $66,000 per year , and she pays a net federal income tax rate of 18 85% How much should Kathy expect to pay in taxes

soldi70 [24.7K]

Answer: 124.41
explanation: well basically your finding the percent of the 66000 she pays the taxes with. well basically I multiply 66000 by 18.85% and got 12441 and divide that by 100 because percents are always out of 100 divides that and I got 124.41
I hope I helped

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3 years ago

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Which ordered pair is the solution to the system of linear equations y=-7X+2 and y-9x- 14

blagie [28]

Answer:

(1,-5)

Step-by-step explanation:

9x-14 = -7x+2

16x = 16

x=1 (therefore must be the second choice but just to check...)

y= -7(1) +2 = -5

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3 years ago

What is the circumstance of the circle

PilotLPTM [1.2K]

Answer:

8pi

Step-by-step explanation:

circumference of the circle=2 pi r(radius)

=2pi×d(diameter)/2

=2 × pi × 8/2

=8 pi cm

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3 years ago