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Salsk061 [2.6K]

3 years ago

11

Alex usually runs for 21 hours a week, training for a marathon. if he is unable to run for 3 days, describe how to find out how

many hours of training time he loses, and write the appropriate integer to describe how it affects his time.

1 answer:

Molodets [167]3 years ago

6 0

Divide the number of hours he has to run that week by the number of days he needs to run it in

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The indicated variable for a+3/b=c is a+3/b - c=0. That is the answer i am pretty sure.

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Find the value of the expression.<br>-35 – 17 + 55 + 39 =

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Step-by-step explanation:

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1. What is the circumference of a circle with a radius of 3? (1 point)

4vir4ik [10]

1. $6 \pi$
This is because
$c= \pi d \\ 
c= 6 \pi$

2. $9 \pi$
because
$A= \pi r^{2} \\ 
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Can't really answer the last 2 w/o the figures

7 0

3 years ago

Pls solve the last box I don’t understand it. Thnx :)

Pavel [41]

Answer:

(0, -3) and (2, 1)

Step-by-step explanation:

There are 5 points marked on the graph: (±2, 1), (±1, -2) and (0, -3). These are solutions to the equation describing the function:

... y = x² - 3

Apparently, you are being asked to report the coordinates of any two of these points.

_____

<em>Comment on the problem</em>

The wording "solutions to the function" is a bit odd. An equation has solutions—values of the variables that make it be true. A function is a relationship between values, a definition. There is nothing to solve.

In the above we have assumed the intent is to find (x, y) pairs that match the function definition. Sometimes, we're interested in values of x that make y be zero. (x, y) = (±√3, 0) It isn't obvious what the intent of this question is.

8 0

3 years ago

I need help to solve this and also Hearn will the bacteria be over 100,000

lapo4ka [179]

Hello! Let's look at the two parts of this question.

Complete the table:

In this case, you just substitute the value of "hour" into the equation, for the value of t. For example:

P(0) = 120 $(2)^{0}$

P(0) = 120 (1)

P(0) = 120

Therefore, the number of bacteria for hour 0 is 120.

You can do this for the next ones. Hour 1 = 240, hour 2 = 480, and so on. (In this case, you can keep multiplying by 2)

Estimate when there will be more than 100,000 bacteria:

Set the final value of P(t) = 100,000, then solve.

100,000 = 120 (2 $)^{t}$

833.33 = (2 $)^{t}$

t = $log_{2}833.33$

t = 9.702744108

So your answer would be around 9.7 years, or, around 10 years.

Hope this helps!

3 0

3 years ago