3 years ago

HELPPP MEE ALGEBRAA IMAGE BELOW

Mathematics

2 answers:

Julli [10]3 years ago

4 0

Answer:

f(x)=0 or 8 I'm honestly not sure which but I know one of these is right

Step-by-step explanation:

subtract x^2-2x from both sides -x^2+8x=0

factor left side of the equation x(-x+8)=0

set factors equal to zero

x=0 or x=-x+8=0

x=0 or x=8

HOPE THIS HELPS!!! :)

marta [7]3 years ago

4 0

Answer:

Step-by-step explanation:

f(x)= x^2 - 2x

f(5) = 5^2 - 2(5) = 25 -10 = 15

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Answer:

Time of murder = 10:39 am

Step-by-step explanation:

Let the equation of exponential function representing the final temperature of the body after time 't' is,

f(t) = $a(e)^{nt}$

Here, a = Initial temperature

n = Constant for the change in temperature

t = Duration

At 11:30 am temperature of the body was 91.8°F.

91.8 = $98.6(e)^{nt}$ --------(1)

Time to reach the body to the morgue = 12:30 pm

Duration to reach = 12:30 p.m. - 11:30 a.m.

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Therefore, equation will be,

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From equation (1),

91.8 = $98.6(e)^{-0.08403t}$

$(e)^{0.08403t}=\frac{98.6}{91.8}$

$ln[(e)^{0.08403t}]=ln[\frac{98.6}{91.8}]$

0.08403t = 0.07146

t = 0.85 hours

t ≈ 51 minutes

Therefore, murder was done 51 minutes before the detectives arrival.

Time of murder = 11:30 - 00:51

= 10:90 - 00:51

= 10:39 am

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