3 years ago

Four times a number increased by five

Mathematics

2 answers:

kolbaska11 [484]3 years ago

7 0

Answer:

4x+5 ...............

34kurt3 years ago

6 0

Answer:

4 x n+5

Step-by-step explanation:

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A detective finds a victim of murder at 9 am. At that time, the temperature of the body is 90.3 degrees F. One hour later, the b

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Step-by-step explanation:

Given

at 9 am temperature of the body is $90.3^{\circ}F$

1 hr later temperature $89^{\circ}F$

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According to newtons law

$\frac{\mathrm{d} T}{\mathrm{d} t}=-k\left ( T-T_{room}\right )$

$\frac{\mathrm{d} T}{\mathrm{d} t}=-k\left ( T-68\right )$

$\frac{dT}{T-68}=-kdt$

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$=\int \frac{dT}{T-68}=-kdt$

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$T-68=Ae^{-kt}$

Now at 9 am i.e. t=0,

$90.3=A+68$

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