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3 years ago

8

You place a cup of 205F coffee on a table in a room that is 72F, and 10 minutes later, it is 195F. Approximately how long will i

t be before the coffee is 180F?

2 answers:

Over [174]3 years ago

8 0

The closest answer would be 35 minutes.

Ray Of Light [21]3 years ago

7 0

Answer:27 Minutes

Step-by-step explanation:Apex

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I need help, I got 80 and 90 but it said I was wrong...

Anton [14]

Answer:

I think it is 90 and 100

Step-by-step explanation:

I used this equation: x is the speed of the slower train

910 = (5x + 10) + 5x

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3 years ago

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omeli [17]

Answer:

y=x+5

Step-by-step explanation:

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2 years ago

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3 years ago

Please answer this correctly

madreJ [45]

Answer:

0

Step-by-step explanation:

3 cards

P( odd) = 1 odd/ 3 cards = 1/3

No replacement

2 cards 6,8

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2 years ago

Show all work to solve by factoring 3x^2 − x − 2 = 0.

shtirl [24]

Answer:

The solutions are x=1 and x=-2/3

Step-by-step explanation:

we have

$3x^{2}-x-2=0$

Group terms that contain the same variable, and move the constant to the opposite side of the equation

$3x^{2}-x=2$

Factor the leading coefficient

$3(x^{2}-(1/3)x)=2$

Complete the square. Remember to balance the equation by adding the same constants to each side

$3(x^{2}-(1/3)x+(1/36))=2+(1/12)$

$3(x^{2}-(1/3)x+(1/36))=25/12$

Rewrite as perfect squares

$3(x-(1/6))^{2}=25/12$

$(x-(1/6))^{2}=25/36$

square root both sides

$(x-(1/6))=(+/-)(5/6)$

$x=(1/6)(+/-)(5/6)$

$x=(1/6)(+)(5/6)=1$

$x=(1/6)(-)(5/6)=-2/3$

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3 years ago