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Sever21 [200]
2 years ago
11

2)

Mathematics
2 answers:
Flauer [41]2 years ago
8 0

Answer:

luke spent 200 minutes napping.

Step-by-step explanation:

the total time span spent by him in the above four activities rounded to nearest 10 :-

=》70 + 60 + 130 + 40

=》300 minutes,

and car trip was of 500 minutes, so total time spent by him sleeping is :-

=》500 - 300

=》200 minutes

tatiyna2 years ago
4 0

Answer:

B.) About 200 minutes napping

Step-by-step explanation:

74+56+128+38=296

500-296=204

204 is about 200

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Which inequality represents this statement?
iren [92.7K]

Answer: the last one!! n\leq 5

Step-by-step explanation:

When there is a line under it means no more than!

8 0
3 years ago
Determine whether the equation is exact. If it​ is, then solve it. e Superscript t Baseline (7 y minus 3 t )dt plus (2 plus 7 e
umka21 [38]

Answer:

F(t,y)=(2+7e^t)y+3(1-t)e^t +C

Step-by-step explanation:

You have the following differential equation:

e^t(7y-3t)dt+(2+7e^t)dy=0

This equation can be written as:

Mdt+Ndy=0

where

M=e^t(7y-3t)\\\\N=(2+7e^t)

If the differential equation is exact, it is necessary the following:

\frac{\partial M}{\partial y}=\frac{\partial N}{\partial t}

Then, you evaluate the partial derivatives:

\frac{\partial M}{\partial y}=\frac{\partial}{\partial t}e^t(7y-3t)\\\\\frac{\partial M}{\partial t}=7e^t\\\\\frac{\partial N}{\partial t}=\frac{\partial}{\partial t}(2+7e^t)\\\\\frac{\partial N}{\partial t}=7e^t\\\\\frac{\partial M}{\partial t} = \frac{\partial N}{\partial t}

The partial derivatives are equal, then, the differential equation is exact.

In order to obtain the solution of the equation you first integrate M or N:

F(t,y)=\int N \partial y = (2 +7e^t)y+g(t)        (1)

Next, you derive the last equation respect to t:

\frac{\partial F(t,y)}{\partial t}=7ye^t+g'(t)

however, the last derivative must be equal to M. From there you can calculate g(t):

\frac{\partial F(t,y)}{\partial t}=M=(7y-3t)e^t=7ye^t+g'(t)\\\\g'(t)=-3te^t\\\\g(t)=-3\int te^tdt=-3[te^t-\int e^tdt]=-3[te^t-e^t]

Hence, by replacing g(t) in the expression (1) for F(t,y) you obtain:

F(t,y)=(2+7e^t)y+3(1-t)e^t +C

where C is the constant of integration

8 0
3 years ago
Please help me ASAP!!! Will give brainlist:))
trasher [3.6K]

Answer:

I think it is D

Step-by-step explanation:

I am guessing because the stem should be 5 for sure but I am not so sure about my answer it leaves you with one of the choices with the number 5 in them.

I hoped I kinda helped if I didn't I am so sorry :(

5 0
3 years ago
Kyle has 2 3/4 pounds of flour. He wants to divide the flour into 3 equal-sized
marta [7]
About .92 lbs or 11/12 lbs in each bag
6 0
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a music store is having a clearance sale. all items are discounted by 30%. what is the sale price of a radio that regularly cost
My name is Ann [436]
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= (70/100)  * 50

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