Find the roots of the function 8x^2+20=148

Mathematics

2 answers:

weqwewe [10]3 years ago

5 0

Answer:

it's B +/-4

Step-by-step explanation:

erastova [34]3 years ago

3 0

Answer: +/- 4

Step-by-step explanation:

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A container contains water at temperature 80 degree celcius. After every 10 minutes, the change in temperature is - 4 degree cel

lilavasa [31]

For this case, the first thing we must do is define variables.
We have then:
x: number of minutes
y: final temperature
We write then the equation that models the problem:
$y = (-4/10) x + 80
$
For y = 20 we have:
$20 = (-4/10) x + 80
$
Clearing x:
$(4/10) x = 80 - 20

x = (10/4) * 60

x = 150$
Answer:
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Tpy6a [65]

A)

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\\\\\\
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B)

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Hope this will help u....