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worty [1.4K]
3 years ago
5

Word phrase to represent 5x+2

Mathematics
2 answers:
notsponge [240]3 years ago
7 0
Five times the number x plus two
Makovka662 [10]3 years ago
3 0
Hey there!

Generally, variables can be referred to as "a number" or something similar since they have yet to be defined. Addition can be referred to as a number "more than" and multiplication can be said to be a number "times" or "multiplied by" another number. 

In this example, you can say that x is "a number" and that it is multiplied "times 5". The entire phrase could be "2 more than 5 times a number". 

Hope this helped you out! :-)
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Step-by-step explanation:

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The half-life of caffeine in a healthy adult is 4.8 hours. Jeremiah drinks 18 ounces of caffeinated
statuscvo [17]

We want to see how long will take a healthy adult to reduce the caffeine in his body to a 60%. We will find that the answer is 3.55 hours.

We know that the half-life of caffeine is 4.8 hours, this means that for a given initial quantity of coffee A, after 4.8 hours that quantity reduces to A/2.

So we can define the proportion of coffee that Jeremiah has in his body as:

P(t) = 1*e^{k*t}

Such that:

P(4.8 h) = 0.5 = 1*e^{k*4.8}

Then, if we apply the natural logarithm we get:

Ln(0.5) = Ln(e^{k*4.8})

Ln(0.5) = k*4.8

Ln(0.5)/4.8 = k = -0.144

Then the equation is:

P(t) = 1*e^{-0.144*t}

Now we want to find the time such that the caffeine in his body is the 60% of what he drank that morning, then we must solve:

P(t) = 0.6 =  1*e^{-0.144*t}

Again, we use the natural logarithm:

Ln(0.6) = Ln(e^{-0.144*t})

Ln(0.6) = -0.144*t

Ln(0.6)/-0.144 = t = 3.55

So after 3.55 hours only the 60% of the coffee that he drank that morning will still be in his body.

If you want to learn more, you can read:

brainly.com/question/19599469

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2 years ago
I’ve been missing school a lot for personal reasons,can i get help with this one ?
Alecsey [184]

Step-by-step explanation:

boom therrs tha answer

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