HELP 10 MIN LEFT BRAINLIST

Mathematics

1 answer:

Murljashka [212]3 years ago

8 0

Answer:

3rd one

Step-by-step explanation:

3a2b7(5a3b8)

=15a5b15

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How do I solve this?

evablogger [386]

It is just asking you what the y-value is when x=6. In this case it is about 2.5

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3 years ago

Ms. Good has a bag of 15 marbles. Three are blue, six are red, and six are yellow. What is the probability that she picks a yell

gizmo_the_mogwai [7]

Answer:

the chances of her picking a yellow one is 6 in 15

Step-by-step explanation:

all you have to do is divide the color that you are trying to find the probability of by the amount of that object is if that makes sense.

- HOPE THIS HELPED!! PLEZZZ MARK ME AS BRAINLYEST PLEZZZ!!!!

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3 years ago

(1 point) a tank contains 1060 l of pure water. a solution that contains 0.06 kg of sugar per liter enters the tank at the rate

kirill115 [55]

(a) There is 0 kg of sugar in the tank at the beginning since it contains pure water at the start. The sugar only comes from the solution.

(b)

$S' = f(t,S) = \left(0.06 \dfrac{\text{kg}}{\text{L}}\right)\left(9\dfrac{\text{L}}{\text{min}}\right) - \left(\dfrac{S}{1060} \dfrac{\text{kg}}{\text{L}}\right)\left(9\dfrac{\text{L}}{\text{min}}\right) \ \Rightarrow \\ \\ S' = 0.54 \text{ kg}/\text{min} - \dfrac{9S}{1060}$

So yes, you enter S' = 0.54 - (9S/1060)

(c)

$\displaystyle\frac{dS}{dt} = 0.54 - \frac{9S}{1060} \ \Rightarrow\ \frac{dS}{dt} = \frac{572.4 - 9S}{1060}\ \Rightarrow\ \dfrac{dS}{572.4 - 9S} = \frac{1}{1060} dt\ \Rightarrow \\ \\
\int \dfrac{dS}{572.4 - 9S} = \int \frac{1}{1060} dt\ \Rightarrow\textstyle\ -\frac{1}{9}\ln|572.4 - 9S| = \frac{1}{1060}t + C \\ \\
S(0) = 0 \ \Rightarrow\ -\frac{1}{9}\ln|572.4 - 0| = \frac{1}{1060}(0) + C\ \Rightarrow\ C = -\frac{1}{9} \ln 572.4$

$-\frac{1}{9}\ln|572.4 - 9S| = \frac{1}{1060}t -\frac{1}{9} \ln 572.4\ \Rightarrow \\ \\
\ln|572.4 - 9S| = \ln 572.4 - \frac{9}{1060}t \ \Rightarrow \\ \\
|572.4 - 9S| = e^{\ln 572.4 - 9t/1060}\ \Rightarrow \\ \\
572.4 - 9S= \pm 572.4 e^{-9t/1060}\ \Rightarrow \\ \\
S = \frac{-1}{9}\left(-572.4 \pm 572.4 e^{-9t/1060}\right)$

But only (+) satisfies $S(0) = 0$

$S= -\frac{1}{9}\left(-572.4 + 572.4 e^{-9t/1060}\right) \\ \\
S= 63.6 - 63.6 e^{-9t/1060}\text{ kg}$

Enter in S = 63.6 - 63.6 * e^(-9t/1060)

3 0

3 years ago

Write in mathematical expression and simplify "5 tiems the sum of 12 and 8".

Anettt [7]

Step-by-step explanation:

5(12+8)...

if my answer helps you than mark me as brainliest.

4 0

3 years ago

Rewrite the rational expression as an equivalent rational expression whose denominator is the given polynomial (9y-1)/(25x^2+30)

stepan [7]

$\frac{9y - 1}{25x^{2} + 30} = \frac{blank}{50x^{2} + 60}$
$\frac{9y - 1}{5(5x^{2} + 6)} = \frac{blank}{10(5x^{2} + 6)}$
$\frac{9y - 1}{1} = \frac{blank}{2}$
$blank = 2(9y - 1)$
$blank = 18y - 2$

3 0

4 years ago