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andreyandreev [35.5K]
3 years ago
7

Plz help PRE CALC !!!!!!!

Mathematics
1 answer:
sergey [27]3 years ago
5 0

Answer:

I think it's the second one. 5.6487

Step-by-step explanation:

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An animal shelter spends $5.00 per day to care for each bird and $7.50 per day to care for each cat. Jayden noticed that the she
Vilka [71]

Answer:

   24 birds

Step-by-step explanation:

Let b represent the number of birds at the shelter on Wednesday. Then the cost of care for the 41 animals is ...

  5b +7.5(41 -b) = 247.50

  -2.5b +307.50 = 247.50 . . . . . simplify

  -2.5b = -60 . . . . . . . . . . . . . . . . subtract 307.50

  b = 24 . . . . . . . . . divide by -2.5

The number of birds at the shelter on Wednesday was 24.

7 0
3 years ago
Consider the function below. (If an answer does not exist, enter DNE.) f(x) = x3 − 27x + 3 (a) Find the interval of increase. (E
xxTIMURxx [149]

Answer:

(-∞,-3) and (3,∞)  

Step-by-step explanation:

f(x) = x³ − 27x + 3

1. Find the critical points

(a) Calculate the first derivative of the function.

f'(x) = 3x² -27  

(b) Factor the first derivative

f'(x)= 3(x² - 9) = 3(x + 3) (x - 3)

(c) Find the zeros

3(x + 3) (x - 3) = 0

x + 3 = 0      x - 3 = 0

     x = -3          x = 3

The critical points are at <em>x = -3</em> and x = 3.

2. Find the local extrema

(a) x = -3

f(x) = x³ − 27x + 3 = (-3)³ - 27(-3) + 3 = -27 +81 + 3 = 57

(b) x = 3

f(x) = x³ − 27x + 3 = 3³ - 27(3) + 3 = 27 - 81 + 3 = -51

The local extrema are at (-3,57) and (3,-51).

3, Identify the local extrema as maxima or minima

Test the first derivative (the slope) over the intervals (-∞, -3), (-3,3), (3,∞)

f'(-4) = 3x² -27 = 3(4)² - 27  = 21

f'(0) = 3(0)² -27 = -27

f'(4) = 3(4)² - 27 = 51

The function is increasing on the intervals (-∞,-3) and (3,∞).

The graph below shows the critical points of your function.

6 0
3 years ago
Which value for the variable w makes the value of this expression 10?
Sidana [21]

Answer:

5

Step-by-step explanation:

50/5=10

therefore 5 is your answer

3 0
2 years ago
Read 2 more answers
Plzzz help i need help quick the right answer gets a thanks, 5 stars, and a Brainly!
alexgriva [62]

Answer:

The absoloute value is 2

Step-by-step explanation:

absoloute value is the places away from 0. -2 is 2 spots away from 0.

5 0
3 years ago
Read 2 more answers
Create an equivalent expression that includes a set of parentheses that make the value of the expression 5. Remember, you can ha
Naily [24]
Answer: the Answer is 33
8 0
2 years ago
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