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SCORPION-xisa [38]
3 years ago
12

The table shows the participation in a school's debate club during the last four years.

Mathematics
1 answer:
AURORKA [14]3 years ago
5 0
14! Is the right answer
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so if i have 2 brands of fruit snacks and one of them costs 48.60 and the other brand is 40.15 which brand cost less per pound
Lynna [10]

Answer: 40.15

Step-by-step explanation: 40.15 IS LESS THEN 48.60

4 0
3 years ago
Cgi- jici- oir<br><br>only show type person come​
Feliz [49]

Answer:

what

Step-by-step explanation:

8 0
2 years ago
I really need help with this problem steps
melamori03 [73]
Solve for y by setting one equation =to X after that you can substitute the equation into the other one let's set the first one in X= FORM
X-7y=10
-2x+14y=-20

Add 7y to both sides of the first equation to let x stand alone
X=7y+10
Now you can substitute x on the second equation
-2 (7y+10)+14y=-20
Distribute
-14y-20+14y=-20
Add and simplify
Us cancel out =0
-20=-20
0=0
They are the same equations you can also divide the second equation by -2 which would make it look like this
X-7y=10
-2 (x-7y=10)
Let me know if I have answered your question
5 0
3 years ago
3y-15-6x in slope intercept form
ASHA 777 [7]
When you think of slope intercept form we think of Y=mx+b
m=slope and b = intercept

So all you do is solve for Y in your given equation.

Im going to guess the equal sign  because you didn't include it. I can fix the answer is I was wrong.

3y-15=6x    (add 15 to both sides)

3y=6x+15 (divide by 3)

y=2x+3 (final answer)


5 0
3 years ago
A manufacturer of golf equipment wishes to estimate the number of left-handed golfers. A previous study indicates that the propo
never [62]

Answer:

A sample of 997 is needed.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the z-score that has a p-value of 1 - \frac{\alpha}{2}.

The margin of error is of:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

A previous study indicates that the proportion of left-handed golfers is 8%.

This means that \pi = 0.08

98% confidence level

So \alpha = 0.02, z is the value of Z that has a p-value of 1 - \frac{0.02}{2} = 0.99, so Z = 2.327.  

How large a sample is needed in order to be 98% confident that the sample proportion will not differ from the true proportion by more than 2%?

This is n for which M = 0.02. So

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.02 = 2.327\sqrt{\frac{0.08*0.92}{n}}

0.02\sqrt{n} = 2.327\sqrt{0.08*0.92}

\sqrt{n} = \frac{2.327\sqrt{0.08*0.92}}{0.02}

(\sqrt{n})^2 = (\frac{2.327\sqrt{0.08*0.92}}{0.02})^2

n = 996.3

Rounding up:

A sample of 997 is needed.

3 0
3 years ago
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