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IgorC [24]
3 years ago
13

15 points!!!At Priscilla's Purse Warehouse, it takes fraction 2 over 3 of a day to complete fraction 1 over 9 of an order of pur

ses. At this rate, how long will it take to complete the entire order of purses? 3 + 2 over 3days
5 days
6 days
13+1 over 2 days
Mathematics
2 answers:
katen-ka-za [31]3 years ago
5 0

Answer:

6 days


Step-by-step explanation:


worty [1.4K]3 years ago
3 0

Answer:

6 days

Step-by-step explanation:

1/9  of an order takes 2/3 days

1 order takes 2/3 * 9

= 18/3

= 6 days   answer

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If you stacked Avogadro's number of pennies one on top of the other on Earth's surface, how far would the stack extend (in kilom
miskamm [114]

Answer:my

The height of the stack will be 9.15×10^20_m

Or 9.15×10^17_Km

Which is 6 billion times more more than the distance to the sun

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Step-by-step explanation:

Given

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The height of the stack will be

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Bingel [31]

Answer:

yes

Step-by-step explanation:

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3 0
3 years ago
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Which of the following functions are solutions of the differential equation y'' + y = 3 sin x? (select all that apply)
DiKsa [7]

Answer:

C

Step-by-step explanation:

We must compute the derivatives and check if the equation is satisfied.

A. y'=(3\sin x)'=3\cos x. Differentiate again to get y''=(3\cos x)'=-3\sin x, then y''+y=-3\sin x+3\sin x=0\neq 3\sin x so this choice of y doesn't solve the equation.

B. y'=3\sin x+3x\cos x-5\cosx +5x\sin x=(5x+3)\sin x+(3x-5)\cos x and y''=5\sin x+(5x+3)\cos x+3\cos x-(3x-5)\sin x=(10-3x)\sin x+(5x+6)\cos x, then y''+y=10\sin x+6\cos x\neq 3\sin x so y is not a solution

C. y'=\frac{-3}{2}\cos x+\frac{3}{2}x\sin x hence y''=\frac{3}{2}\sin x+\frac{3}{2}\sin x+\frac{3}{2}x\cos x=3\sin x+\frac{3}{2}x\cos x. Then y''+y=3\sin x+\frac{3}{2}x\cos x-\frac{3}{2}x\cos x=3\sin x so y is a solution.

D.y'=-3\sin x and y''=-3\cos x, then y''+y=0 thus y isn't a solution

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