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bagirrra123 [75]
3 years ago
12

Martha made a scale drawing of a neighborhood park. The scale she used was 1 centimeter = 3

Mathematics
1 answer:
erma4kov [3.2K]3 years ago
7 0

Answer:

Option A

Step-by-step explanation:

1 centimeter = 3  meters.

Volleyball court is 3 centimeters in the drawing.

So, 3 + 3 + 3 = 9 cm

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What is Increase 48 by 1/2
antoniya [11.8K]

Answer:

50% percentage increase = 72

48 + 1/2 = 48.5

Step-by-step explanation:

8 0
3 years ago
Find constants a and b such that the function y = a sin(x) + b cos(x) satisfies the differential equation y'' + y' − 5y = sin(x)
vichka [17]

Answers:

a = -6/37

b = -1/37

============================================================

Explanation:

Let's start things off by computing the derivatives we'll need

y = a\sin(x) + b\cos(x)\\\\y' = a\cos(x) - b\sin(x)\\\\y'' = -a\sin(x) - b\cos(x)\\\\

Apply substitution to get

y'' + y' - 5y = \sin(x)\\\\\left(-a\sin(x) - b\cos(x)\right) + \left(a\cos(x) - b\sin(x)\right) - 5\left(a\sin(x) + b\cos(x)\right) = \sin(x)\\\\-a\sin(x) - b\cos(x) + a\cos(x) - b\sin(x) - 5a\sin(x) - 5b\cos(x) = \sin(x)\\\\\left(-a\sin(x) - b\sin(x) - 5a\sin(x)\right)  + \left(- b\cos(x) + a\cos(x) - 5b\cos(x)\right) = \sin(x)\\\\\left(-a - b - 5a\right)\sin(x)  + \left(- b + a - 5b\right)\cos(x) = \sin(x)\\\\\left(-6a - b\right)\sin(x)  + \left(a - 6b\right)\cos(x) = \sin(x)\\\\

I've factored things in such a way that we have something in the form Msin(x) + Ncos(x), where M and N are coefficients based on the constants a,b.

The right hand side is simply sin(x). So we want that cos(x) term to go away. To do so, we need the coefficient (a-6b) in front of that cosine to be zero

a-6b = 0

a = 6b

At the same time, we want the (-6a-b)sin(x) term to have its coefficient be 1. That way we simplify the left hand side to sin(x)

-6a  -b = 1

-6(6b) - b = 1 .... plug in a = 6b

-36b - b = 1

-37b = 1

b = -1/37

Use this to find 'a'

a = 6b

a = 6(-1/37)

a = -6/37

8 0
3 years ago
NEED THE CORRECT ANSWER TO THIS ASAP!!!Sylvie needs $110 for a concert ticket. She already has $16 and she can earn the rest by
harkovskaia [24]

Answer:

d

Step-by-step explanation:110-16 + 10h

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3 years ago
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trapecia [35]

Answer:

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Step-by-step explanation:

just subtract 7 from largest number down to smaller numbers to notice the pattern. :)

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3 years ago
Show steps please, Need answer ASAP
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Step one:
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