All categories

3 years ago

Help meh plz I just need answer question in pic

Mathematics

1 answer:

Yanka [14]3 years ago

4 0

Answer:

Step-by-step explanation:

At the vertex, the quadratic term in this notation must be zero, i.e., the (x-1) part. This happens for x=1. So you can already rule out answers C and D.

Now fill in x=-2 in both remaining answers and see what happens.

For A: y = -2(-2 - 1)² + 3 = -15

For B: y = (-2 - 1)² + 3 = 12

That eliminates B and leaves A.

You might be interested in

Rob owns 1/8 of the stock in a local bread company. His sister Talia owns half as much stock as Rob. What part of the stock is o

Nana76 [90]

Answer:

$\frac{13}{16}$

Step-by-step explanation:

1/2 of 1/8 is the same thing as 1/2*1/8.

So multiply it out:

$\frac{1}{2}*\frac{1}{8}=\frac{1}{16}$ This is the amount of stock that Talia uses.

Now covert:

$\frac{1}{8}=\frac{2}{16}$ This is how much Rob owns.

Now add:

$\frac{2}{16}+\frac{1}{16}=\frac{3}{16}$

Since you cannot simplify, the answer would be

$\frac{3}{16}$ .

Now subtract $\frac{3}{16}$ from the possible value.

$\frac{16}{16} -\frac{3}{16}$ and you get $\frac{13}{16}$ . This is the portion that they both don't share.

Hope it Helps!

7 0

4 years ago

Read 2 more answers

-1/2 + (3/4times4/9)=

zimovet [89]

Answer:-1/6

Step-by-step explanation:

-1/2 + (3/4times4/9)

-1/2 + (3/4 x 4/9)

-1/2 + (3x4)/(4x9)

-1/2 + 12/36

(18 x -1 + 1 x 12)/36

(-18+12)/36

-6/36=-1/6

8 0

3 years ago

Suppose that a local TV station conducts a survey of a random sample of 120 registered voters in order to predict the winner of

forsale [732]

Answer:

a) The 99% CI for the true proportion of voters who prefer the Republican candidate is (0.3658, 0.6001). This means that we are 99% sure that the true population proportion of all voters who prefer the Republican candidate is (0.3658, 0.6001).

b) The upper bound of the confidence interval is above 0.5 = 50%, which meas that the candidate can be confidence of victory.

Step-by-step explanation:

Question a:

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 $1 - \frac{\alpha}{2}$ .

Sample of 120 registered voters in order to predict the winner of a local election. The Democrat candidate was favored by 62 of the respondents.

So 120 - 62 = 58 favored the Republican candidate, so:

$n = 120, \pi = \frac{58}{120} = 0.4833$

99% confidence level

So $\alpha = 0.01$ , z is the value of Z that has a p-value of $1 - \frac{0.01}{2} = 0.995$ , so $Z = 2.575$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.4833 - 2.575\sqrt{\frac{0.4833*0.5167}{120}} = 0.3658$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.4833 + 2.575\sqrt{\frac{0.4833*0.5167}{120}} = 0.6001$

The 99% CI for the true proportion of voters who prefer the Republican candidate is (0.3658, 0.6001). This means that we are 99% sure that the true population proportion of all voters who prefer the Republican candidate is (0.3658, 0.6001).

b. If a candidate needs a simple majority of the votes to win the election, can the Republican candidate be confident of victory? Justify your response with an appropriate statistical argument.

The upper bound of the confidence interval is above 0.5 = 50%, which meas that the candidate can be confidence of victory.

8 0

3 years ago

Explain how to use a net to find the surface area of a prism

r-ruslan [8.4K]

Answer:

use a net to fin surface area of a prism by multyplying 10 to the power of 50

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

PLEASE HELP!!!!!!!!!!!!

hammer [34]

Answer:

The answer to your question is: Option B is correct

Step-by-step explanation:

Which expression is equivalent to the square root of 80?

Find the prime factors of 80

80 = 2⁴5 then $\sqrt{80} = 4\sqrt{5}$ = $\sqrt{2^{2}2^{2} 5 }$

Option A which is 4 square root of 2 times the square root of 5 This option is incorrect

Option B which is square root of 2^4 times the square root of 5 This option is correct

Option C which is the square root of 2 times the square root of 2 times the square root of 5 This option is incorrect

Option D which is the square root of 2^2 times the square root of 2^2 times the square root of 5^2 This option is incorrect

6 0

3 years ago