2 years ago

Hey guys what's 25 divided by 7 plus 10??

Mathematics

1 answer:

ale4655 [162]2 years ago

8 0

The answer is 13.57
First 25/7 which is 3.57
Second add 10

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Solve the equation 15p2 + 7p − 4 = 0 by completing the square.

natulia [17]

Answer:

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Step-by-step explanation:

15p2+7p=0

p(15p+7)=0

p=0 or 15p+7=0

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2 years ago

Is 43 odd or even?but the answer don't have to be great i just need a answer

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43 is an odd number.

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3 years ago

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3 years ago

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A cold drink is poured out at 52°F. After 2 minutes of sitting in a 72°F room, its temperature has risen to 55°F. Find an equati

I am Lyosha [343]

Answer:

The model for the temperature of the drink can be written as

$T=72-20e^{-0.08t}$

Step-by-step explanation:

For a cold drink in a hotter room, we can say that the rate of change of temperature of the drink is proportional to the difference of temperature between the drink and the room.

We can model that in this way

$\frac{dT}{dt}=k*(T_r-T)$

If we rearrange and integrate

$\int\frac{dT}{(T-Tr)} =-k*\int dt\\\\ln(T-T_r)=-kt+C1\\\\T-T_r=Ce^{-kt}\\\\T=T_r+Ce^{-kt}$

We know that at time 0, the temperature of the drink was 52°F. Then we have:

$T=T_r+Ce^{-kt}\\\\52=72+Ce^0=72+C\\\\C=-20$

We also know that at t=2, T=55°F

$T=T_r+Ce^{-kt}\\\\55=72-20e^{-k*2}\\\\e^{-k*2}=(72-55)/20=0.85\\\\-2k=ln(0.85)=-0.1625\\\\k=0.08$

The model for the temperature of the drink can be written as

$T=72-20e^{-0.08t}$

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3 years ago

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nadezda [96]

Answer:

SOLVE FOR Y

graph y= 2x + 2

sp graph the points

(0,2) and then (1,4)

connect the points and extend the line.

Step-by-step explanation:

add 2x to both sides

-2x+y=2

+2x +2x

y= 2+2x

reverse

y= 2x+2

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3 years ago