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Grace [21]
3 years ago
14

Someone pls help plsssss?? ASAP pls

Mathematics
1 answer:
larisa [96]3 years ago
5 0
1)First, understand that whatever your equation is it’s always gonna be less than 100, because she doesn’t wanna get more than 100 ft.
*>100
2) remember that Lainey already dropped 20 feet. The amount of minutes is your unknown variable (x)
3) so, note that the rate is 20 ft/minute. If you multiply 20 by the amount of minutes she has to descend (your unknown variable: x) you cancel out the “minutes” in the 20 ft/minute fraction.
(Ex. 20ft/min *multiply* x [unknown]minutes= 20ftx)
This is what you want since you need all of the terms to be the same unit to solve with algebra.
4) so, to put it all together you have, 20 times x (representing the unknown amount of minutes) plus 20 (representing the amount she has already fallen) is greater than 100

* 20x+20>100
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Consider rolling two fair dice one 3-sided the other 5-sided
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Since the dice are fair and the rolling are independent, each single outcome has probability 1/15. Every time we choose

1\leq x\leq 3,\quad 1\leq y \leq 5

We have P(X=x)=\frac{1}{3} and P(Y=y)=\frac{1}{5}, because the dice are fair.

Now we use the assumption of independence to claim that

P(X=x, Y=y) = P(X=x)\cdot P(Y=y) =\dfrac{1}{3}\cdot\dfrac{1}{5} = \dfrac{1}{15}

Now, we simply have to count in how many ways we can obtain every possible outcome for the sum. Consider the attached table: we can see that we can obtain:

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This implies that the probabilities of the outcomes of W=X+Y are the number of possible ways divided by 15: we can obtain 2 and 8 with probability 1/15, 3 and 7 with probability 2/15, and 4, 5 and 6 with probabilities 3/15=1/5

8 0
3 years ago
The equation, y = 12841(1.01)x , represents the average cost of an education at a private college, after 1990. What is the avera
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3 0
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olga_2 [115]
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<span> 5.1 </span>    Pull out like factors :

  <span> 75x4 + 3x3y + 15x2y2</span>  =  <span> 3x2 • (25x2 + xy + 5y2)</span> 

Trying to factor a multi variable polynomial :

<span> 5.2 </span>   Factoring   <span> 25x2 + xy + 5y2</span> 

Try to factor this multi-variable trinomial using trial and error<span> 

 </span>Factorization fails

Final result :<span> 3x2 • (25x2 + xy + 5y2) </span><span>

</span>
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