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kotegsom [21]
3 years ago
8

Bertie was having some trouble with his math problem so he asked his friend Gabby. Do you multiply by eight and then add five or

do you add five and then multiplied by eight he asked her the same thing Gabby Do you multiply by eight and then add five or do you add five and then multiplied by eight he asked her the same thing Gabby casually answered
Mathematics
1 answer:
galina1969 [7]3 years ago
3 0

Answer:

<h2><em>You multiply by eight then add five.</em></h2>

Step-by-step explanation:

<h3>When you follow PEMDAS, it goes:</h3><h3>P <em>arenthesis </em></h3><h3>E <em>xponents </em></h3><h3>M <em>ultiplication </em></h3><h3>D <em>ivision </em></h3><h3>A <em>ddition </em></h3><h3>S <em>ubtraction </em></h3><h3><em /></h3><h3><em>                                  ^^Hope this helps!^^</em></h3>
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The concentration of a drug in the bloodstream C(t) at any time t, in hours, is described by the equationC(t)=100t/t^2+25where t
alisha [4.7K]

Answer:

It will take 5 hours until it reaches its maximum concentration.

Step-by-step explanation:

The maximum concentration will happen in t hours. t is found when

C'(t) = 0

In this problem

C(t) = \frac{100t}{t^{2} + 25}

Applying the quotient derivative formula

C'(t) = \frac{(100t)'(t^{2} + 25) - (t^{2} + 25)'(100t)}{(t^{2} + 25)^{2}}

C'(t) = \frac{100t^{2} + 2500 - 200t^{2}}{(t^{2} + 25)^{2}}

C'(t) = \frac{-100t^{2} + 2500}{(t^{2} + 25)^{2}}

A fraction is equal to zero when the numerator is 0. So

-100t^{2} + 2500 = 0

100t^{2} = 2500

t^{2} = 25

t = \pm \sqrt{25}

t = \pm 5

We use only positive value.

It will take 5 hours until it reaches its maximum concentration.

4 0
3 years ago
For babysitting, Angie charges a flat fee of $3, plus $5 per hour. Write an equation for the cost, C, after h hours of babysitti
Ghella [55]

Answer:

C=5h+3 when h=5

C=28

Step-by-step explanation:

She charges $5 per hour (5h)

and a flat fee of $3 (+3).

Replace the h (the number of hours babysitting) with 5 (the amount of hours you want to find for).

Then you multiple 5 and 5, then add 3.

Which gives you an answer of $28.

Hope this helped!

7 0
4 years ago
A worker gets $9/hr for a regular work day and $13.50/hr for additional hours. If he was paid $114.75 for an 11hr work day, how
Anika [276]

1. I did 9x8 since you usually work 8 hours a day but did not give answer, so I add or subtracted 0.5 to 8.

2. i did 9*7.5=67.5 , keep in mind that he worked for 11 hrs that day so 11-7.5=3.5 hours left

3. then I subtracted 67.5 from 114.75 and got 47.25

4. I divided 3.5 by 47.25 and got 13.5

4 0
3 years ago
NEED HELP!!!!!!!!
valkas [14]

Answer:

68 feet

Step-by-step explanation:

30 x (30-x) = 240

30-x = 8

-x = -22

x = 22

Therefore width is 30-22 = 8 feet

8+8+30+30 = 76  total for all 4 sides.


George would need 76 feet of fencing for the dog run IF he was not using his house as one side of the run.  Therefore, taking the 76 total feet that would be required to go around all 4 sides and subtracting the feet of one width (8 feet), gives a total of 68 feet.



5 0
3 years ago
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Why does love suck......................
marishachu [46]

Love doesn't suck, fake love does. I'm feelin' the same thing you are :(

5 0
3 years ago
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