3 years ago

Which of the following statements are true?

Mathematics

1 answer:

elena-14-01-66 [18.8K]3 years ago

3 0

Answer: D (I think)

Step-by-step explanation:

You might be interested in

Find the X-COORDINATE of Point P such that P partitions segment AB three- sevenths of the way from A to B. A(-9-9) and B(5,19)

tatiyna

It’s 55778 Ann’s slide it’s 5

6 0

3 years ago

How can you express 5 1/3 + (-7 2/3) as the sum of its integer and fractional parts

Yuliya22 [10]

Answer:

-7/3

Step-by-step explanation:

-7 2/3=-23/3

5 1/3=16/3

-----------------

16/3+(-23/3)

16/3-23/3

-7/3

6 0

2 years ago

Evaluate f(x) = sqrt(5x + 4) for x = 12

Nezavi [6.7K]

Answer is 8

Work Shown:

f(x) = sqrt(5*x + 4)

f(12) = sqrt(5*12 + 4) ... replace every x with 12

f(12) = sqrt(60 + 4)

f(12) = sqrt( 64 )

f(12) = 8

8 0

3 years ago

In order to estimate the average electric usage per month, a sample of 81 houses was selected and the electric usage was determi

lana [24]

Answer:

Confidence interval: (1760,1956)

Step-by-step explanation:

We are given the following information in the question:

Sample size, n = 81

Sample mean =

$\bar{x} = 1858 \text{ kWh}$

Population standard deviation =

$\sigma = 450 \text{ kilowatt-hours}$

Confidence Level = 95%

Significance level = 5% = 0.05

Confidence interval:

$\bar{x} \pm z_{critical}\displaystyle\frac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$z_{critical}\text{ at}~\alpha_{0.05} = \pm 1.96$

$1858 \pm 1.96(\displaystyle\frac{450}{\sqrt{81}} ) = 1858 \pm 98 = (1760,1956)$

6 0

3 years ago

Find the slope of the line (-1,-4) , (-4,2)

Feliz [49]

Rise = -6
Run = 3

-6/3 = -2

Slope = -2

4 0

2 years ago