NEED HELP ASAP - 60 Pts. + BRAINLIEST for the best answer!!! (Please show your work)

Question:
A stretched string fixed at both ends is 21m long.
A) What wavelength would produce a 7th harmonic standing wave?
B) If the speed of the wave on the string is 20 m/s, what frequency would produce a 7th harmonic standing wave?

b. y = 4x - 2

step-by-step explanation:

to find a parallel equation to an equation, make sure both equations have the same slope but different y-intercepts.

y = 4x + 1

4 = slope

1 = y-intercept

y = 4x - 2

4 = slope

-2 = y-intercept

they both have the same slope but different y-intercepts, so, b. is the correct answer.

and to check your work, you can graph both equations. : )

$3,200 x 7.25% = $3,200 x .0725 = $232 interest monthly

$232 monthly x 12 annual = $2, 784

step-by-step explanation:

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step-by-step explanation:

нσρє ι ¢συℓ∂ нєℓρ уσυ συт тσ∂α!