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snow_lady [41]
2 years ago
13

Help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics
2 answers:
const2013 [10]2 years ago
4 0

Function:

f(x) = 30x (75%) + 1

Bacteria after 2 hours:

10,890 bacteria

Zina [86]2 years ago
3 0

Answer:

I'm not sure about the function but here is the answer: 3

Step-by-step explanation:

Well, 75% of 1 is 0.75 + 75% of that + 75% of that and so on until you do it four times. Why four? Well it increases every 30 MINUTES so 30 min + 30 min + 30 min + 30min = 2 hours!

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If f(x)= x2 + 2 and g(x)= 2x-1, find (f ° g)(5).
valentinak56 [21]
I hope this helps you

4 0
3 years ago
Suppose m varies directly as the square of n.<br> If m = 187.2 when n = 12, what is m when n = 20?
Alona [7]
Answer below as attachment. m=520

3 0
3 years ago
If f(x) = – x2 + 6x - 1 and g(x) = 3x<br> - 1, find (f + g)(x).
lesantik [10]

Answer:

-x^2 +9x -2

Step-by-step explanation:

f(x) = – x^2 + 6x - 1 and g(x) = 3x - 1,

(f + g)(x) = f(x) + g(x)

               = – x^2 + 6x - 1 + 3x - 1

Combine like terms

              = -x^2 +9x -2

6 0
3 years ago
On a quiz, tina scored 4 points more than julia and earned 2 points in extra credic. Enter an expression that represent tina's s
andre [41]

Julia’s score is <em>y</em> and Tina’s score is <em>y</em> + 6.

Step-by-step explanation:

Let us take Julia’s score be <em>y</em>.

First Tina scored 4 points more than Julia, so the expression is <em>y</em> + 4.

Then, Tina earned 2 points as extra credic, now the expression becomes

(y + 4) + 2 = y + 6.

Hence Julia’s score is <em>y </em>and Tina’s score is <em>y</em> + 6.

7 0
3 years ago
The value of y varies directly with x. When y=55, x=1/4. Determine the constant of proportionality
docker41 [41]

Answer:

<u>k = 220</u>

Step-by-step explanation:

<u>Proportion of y and x</u>

  • y = kx

<u>Given</u> :

  • y = 55
  • x = 1/4

<u>Solving</u> :

  • 55 = k/4
  • k = 55 x 4
  • <u>k = 220</u>
4 0
2 years ago
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