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Dmitrij [34]
3 years ago
13

In a harris? poll, adults were asked if they are in favor of abolishing the penny. among the? responses, 1225 answered? "no," 49

8 answered? "yes," and 395 had no opinion. what is the sample proportion of yes? responses, and what notation is used to represent? it?
Mathematics
1 answer:
Whitepunk [10]3 years ago
7 0
No could be represented as N, Yes can be Y, and X can be neither.  You have to first see how many people they asked in total.  So add 1225, 498, and 395.  You get 2118.  So that would be the bottom number on all the fractions.

No would be 1225/2118

Yes would be 498/2118

Neither would be 395/2118

You have to be sure you'd put like N=1225/2118 and y=498/2118 and x=395/2118

So you only need to solve for yes.  So the other information should have been included so you could get the total number of people who answered, aka "the bottom number"

so yes is 498/2118 and you have to represent it with a number, I chose y.  But usually they like x if there is only one to solve for.

You need to reduce. With such a high number it can be tough.  But I can see right way I can do 2.

498 divided by 2 is 249.  2118 divided by 2 is 1059.

That makes it y=249/1059

Both of those can reduce by 3.  249 divided by 3 is 83.  1059 divided by 3 is 353.

That makes y=83/353

That's the lowest it can go.
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A pump fills a pool at the rate of 20 cubic meters in an hour. If each cubic meter of water costs $10, how many minutes will the
fomenos

The first thing any good mathematician does is convert the measurements to the same unit as what the question is asking. In this problem, it states that the pool fills at a rate of 20 cubic meters per hour. Just keep in mind that an hour is 60 minutes.

The next step is to see how many cubic meters will cost $300. This can be done by dividing 300 by 10. This gets you 30 cubic meters of water.

You already know that 60 minutes is 20 cubic meters of water. That leaves the remaining 10 cubic meters of water. By dividing the rate given, you get that 30 minutes is 10 cubic meters of water. Add the 60 and 30 together to get 90 minutes.

It will take 90 minutes for the pump to use $300.

7 0
3 years ago
URGENT! 40 POINTS! PLEASE HELP!
umka2103 [35]

Answer:

(a) 8 x(5 x-6)=40 x^{2}-48 x

(c) \begin{aligned}(x-3)(5 x-6) &=5 x^{2}-21 x+18\end{aligned}

Step-by-step explanation:

(a) To find verify the answer we need to multiplying the equation 8 x(5 x-6)

8 x(5 x-6)=40 x^{2}-48 x

Thus, this statement is true.

(b) To find verify the answer we need to multiplying the equation -4 x\left(2 x^{2}+1\right)

-4 x\left(2 x^{2}+1\right)=-8 x^{3}-4 x

Hence, the given statement is false.

(c) To find verify the answer we need to multiplying the equation (x-3)(5 x-6)

\begin{aligned}(x-3)(5 x-6) &=5 x^{2}-6 x-15 x+18 \\&=5 x^{2}-21 x+18\end{aligned}

Hence, the given statement is true.

(d) To find verify the answer we need to multiplying the equation(2 x+3)\left(x^{2}+3 x-5\right)

\begin{aligned}=(2 x+3)\left(x^{2}+3 x-5\right) &=2 x^{3}+6 x^{2}-10 x+3 x^{2}+9 x-15 \\&=2 x^{3}+9 x^{2}-x-15\end{aligned}

Hence, the given statement is false.

4 0
3 years ago
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Answer:

\frac{5}{3} should be correct!

Step-by-step explanation:

6 0
2 years ago
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27,057,324,083 i am pretty sure
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The 7th term of an A.p is -4. If the common difference is-5, find the 6th term​
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Answer:

Step-by-step explanation:

a₆ = a₇+(6-7)d = -4 -(-5) =1

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