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2 years ago

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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valentinak56 [21]

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3 years ago

Suppose m varies directly as the square of n. If m = 187.2 when n = 12, what is m when n = 20?

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3 years ago

If f(x) = – x2 + 6x - 1 and g(x) = 3x - 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,

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= – x^2 + 6x - 1 + 3x - 1

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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 y and Tina’s score is y + 6.

Step-by-step explanation:

Let us take Julia’s score be y.

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

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

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

Hence Julia’s score is y and Tina’s score is y + 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:

k = 220

Step-by-step explanation:

Proportion of y and x

y = kx

Given :

y = 55
x = 1/4

Solving :

55 = k/4
k = 55 x 4
k = 220

4 0

2 years ago