Simplify the following expressions ( use distributed property )

Tutorial D

zalisa [80]

The point is anywhere below 0 on the Y axis

6 0

1 year ago

Mariana runs at a rate of 260 meters per minute.<br><br> How far does she run in 6 minutes?

My name is Ann [436]

Answer:

1560 meters

Step-by-step explanation:

All u had to do was multiply 260 and 6 together and then you get your answer

8 0

3 years ago

Solve for x.<br> -(12x-6)=12x+6

AfilCa [17]

-(12x - 6) = 12x + 6

First, distribute the negative sign on the left side.

It is the same as multiplying the quantity in parentheses by -1.

-1(12x - 6) = 12x + 6

-12x + 6 = 12x + 6

Now, subtract 12x from both sides.

-24x + 6 = 6

Subtract 6 from both sides.

-24x = 0

Divide both sides by -24.

x = 0/(-24)

x = 0

Answer: x = 0

6 0

3 years ago

2. A marketing firm is trying to estimate the proportion of potential car buyers that would consider

Maurinko [17]

Answer:

a. The number of people that should be in the pilot study are 600 people

b. The point estimate is 0.62 $\overline 6$

c. At 95% confidence level the true population proportion of potential car buyers of hybrid vehicle is between the confidence interval (0.588, 0.6654)

d. Two ways to reduce the margin of error are;

1) Reduce the confidence interval

2) Use a larger sample size

Step-by-step explanation:

a. The given parameters for the estimation of sample size is given as follows;

The margin of error for the confidence interval, E = 4% = 0.04

The confidence level = 95%

The sample size formula for a proportion as obtained from an online source is given as follows;

$n = \dfrac{Z^2 \times P \times (1 - P)}{E^2}$

Where, P is the estimated proportions of the desired statistic, therefore, we have for a new study, P = 0.5;

Z = The level of confidence at 95% = 1.96

n + The sample size

Therefore, we have;

$n = \dfrac{1.96^2 \times 0.5 \times (1 - 0.5)}{0.04^2} = 600.25$

Therefore, the number of people that should be in the pilot study in order to meet this goal at 95% confidence level is n = 600 people

b. The point estimate for the population proportion is the sample proportion given as follows;

$\hat p = \dfrac{x}{n}$

Where;

x = The number of the statistic in the sample

n = The sample size

From the question, we have;

The number of potential car buyers, n = 600

The number of respondent in the sample that indicated that they would consider purchasing a hybrid, x = 376

Therefore, the point estimate, for the proportion of potential car buyers that would consider buying a hybrid vehicle, $\hat p$ = 376/600 = 0.62 $\overline 6$