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3 years ago

I need help on this question

Mathematics

1 answer:

kenny6666 [7]3 years ago

8 0

Answer:

666778inches are a different

Step-by-step explanation:

4AM said the new one in the same thing as a good relationship with a child is the difference is that you are a different type and have different opinions and different type and you are not sure what to smome in the same thing to do 5AM or an iPad app that the answer to your phone number is a good relationship with the same way

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Factoring polynomials HELP please step by step for extra points!

jok3333 [9.3K]

First you multiply the last term by the first term (3h+16h+15). Then find numbers that add to 16 and multiply to 15 then add or subtract it from (3h+15)(3h+1). Then factor if possible (h+5)(3h+1)

8 0

3 years ago

A car company took a random sample of 85 people and asked them whether they have a plan to purchanse an electrinic car in the ne

lutik1710 [3]

Answer:

We have 96% of confidence that the true proportion of people who responded that they have a plan to buy one electric car is between (0.121 and 0.303).

Step-by-step explanation:

For this case the estimated proportion of people who responded that they have a plan to buy one electric car is given by:

$\hat p = \frac{X}{n}= \frac{18}{85}=0.212$

Where X represent the number of people who responded that they have a plan to buy one and n represent the sample size selected

We know that the confidence level for this case is 96% of confidence, then our significance level would be $\alpha=1-0.96=0.04$ and $\alpha/2 =0.02$ . And the critical value would be:

$z_{\alpha/2}=-2.05, z_{1-\alpha/2}=2.05$

The confidence interval for the true proportion is given by this expression:

$\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$

Replacing the data given we got:

$0.212 - 2.05\sqrt{\frac{0.212(1-0.212)}{85}}=0.121$

$0.212 + 2.05\sqrt{\frac{0.212(1-0.212)}{85}}=0.303$

We have 96% of confidence that the true proportion of people who responded that they have a plan to buy one electric car is between (0.121 and 0.303).

6 0

4 years ago

Answer ASAP ples I need help 4 prodigy

worty [1.4K]

x^2 = 36

or, x = √36 = ±6

Answer is ±6.

8 0

3 years ago

A piece of wire 25 m long is cut into two pieces. One piece is bent into a square and the other is bent into an equilateral tria

fomenos

Answer:

Wire used for square is 7.55 m.

Step-by-step explanation:

Let the length of wire cut for square be 'x'.

Given:

Total length of the wire = 25 m

Length of wire for square = 'x'

Length of wire for equilateral triangle = $25-x$

Now, area of square (a) = $x^2$

Area of equilateral triangle (e) is given as:

$e=\frac{\sqrt3}{4}(25-x)^2$

Now, total area (A) is given as:

$A=a+e\\\\A=x^2+\frac{\sqrt3}{4}(25-x)^2$

Now, in order to maximize 'A', the derivative of area with respect to 'x' must be 0.

∴ $\frac{dA}{dx}=0$

$\frac{d}{dx}(x^2+\frac{\sqrt3}{4}(25-x)^2)=0\\\\2x-\frac{\sqrt3}{2}(25-x)=0\\\\2x+\frac{x\sqrt3}{2}=\frac{25\sqrt3}{2}\\\\x(2+\frac{\sqrt3}{2})=\frac{25\sqrt3}{2}\\\\x(4+\sqrt3)=25\sqrt3\\\\x=\frac{25\sqrt3}{4+\sqrt3}=7.55\ m$

Therefore, the length of the wire that is cut for square should be 7.55 m for maximum area.

3 0

3 years ago

Helppp!!!!!! :(((((((((((((((((((((((((((((

slavikrds [6]

Answer:

Step-by-step explanation:

1. 9/5 2. 5/9 3. 596/8 4. 1/55 5. 6/7 6. 1/3 7. 4/7 8. 10/9 9. 11/7 10. 4/8 11. 5/7 12. 2/5

5 0

3 years ago