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3 years ago

Bro SOME ONE PLS HELP ME FIND X i am HORRIBLE at math tutor meeee

Mathematics

1 answer:

Damm [24]3 years ago

7 0

B. 10+3x=5

3x=-5 (subtract 5 both sides)

X=. -5/3 (divide both sides by 3)

C. A+x = b

X = b-a (just get x alone)

D. Cx = d

X = d/c

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In a recent poll, 230 people were asked if they liked dogs, and 90% said they did. Find the margin of error of this poll, at the

pychu [463]

The margin of error of this poll is

Given that 230 people were asked if they liked dogs, and 90% said they did.

In a random sample, a margin of error is a statistical measure that takes into account the discrepancy between actual and expected results.

Sample size (N)=230

Sample proportion $(\hat{p})$ = 90% = 0.90 and

confidence interval = 99%

The critical value at 99% confidence interval with α=0.01 is

$\begin{aligned}Z_{c}&=Z_{1-\frac{\alpha}{2}}\\ &=Z_{1-\frac{0.01}{2}}\\ &=Z_{0.995}\\ &=2.576\end$

This value is taken from the Standard normal distribution table.

Now, we will calculate the margin of error (E) by using the formula

$E=Z_{c}\sqrt{\frac{\hat{p}(1-\hat{p})}{N}}$

Substituting the values in the formula, we get

$\begin{aligned}E &=2.576\times \sqrt{\frac{0.90(1-0.90)}{230}}\\ &=2.576\times \sqrt{\frac{0.09}{230}}\\ &=2.576\times\sqrt{0.00039}\\ &=2.576\times 0.0197\\ &=0.0507\end$

Hence, the margin of error when 230 people were asked if they liked dogs, and 90% said they did is 0.0507.

Learn more about margin of error from here brainly.com/question/25779324

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2 years ago

Miranda feeds her fish 12 milligrams of food every 3 days. About how many millagrams of food will she need to feed her fish for

lisov135 [29]

Answer:

128 miligrams for 32 days

Step-by-step explanation:

To do this question, you first need to find out how much food she feeds per day so to do this, you do 12 mg/3 days and you get 4mg/day.

Then you multiply this number by 32.

4mg/day (32 days) = 128 mg

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3 years ago

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A paper cup is dropped and its landing position is recorded. The cup can land on the side, on the open end, or on the closed end

Strike441 [17]

prob( it lands on open end) = 8/20 = 2/5

prob ( lands on closed end) = 4/20 = 1/5

The second choice is correct.

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3 years ago

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X/5x+25+2x-3/x^2-3x-40

zhannawk [14.2K]

Since I can’t type the answer, here is the image of the answer. Hope I helped!

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3 years ago

Please answer this correctly

konstantin123 [22]

Answer:

I might be wrong so possibly DONT USE MY ANSWER but I think 30-33%

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4 years ago