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Sunny_sXe [5.5K]

2 years ago

14

NIKKI'S BACKYARD IS THE SHAPE OF A RECTANGLE. THE LENGTH IS 27 FEET. THE WIDTH IS ONE THIRD THE LENGTH PLUS 4 FEET. WRITE AND EV

ALUATE AN EXPRESSION TO FIND THE AREA OF nIKKIS BACKYARD

2 answers:

Oxana [17]2 years ago

6 0

27÷3+4=w×L...........I hope I'm right

tamaranim1 [39]2 years ago

5 0

Answer: A, D, F

Step-by-step explanation:

Hope this is the correct answer, But lets not quote me on that :]

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A university surveyed recent graduates of the English department for their starting salaries. Four hundred graduates returned th

NeX [460]

Answer:

Step-by-step explanation:

We want to determine a 95% confidence interval for the mean salary of all graduates from the English department.

Number of sample, n = 400

Mean, u = $25,000

Standard deviation, s = $2,500

For a confidence level of 95%, the corresponding z value is 1.96. This is determined from the normal distribution table.

We will apply the formula

Confidence interval

= mean ± z × standard deviation/√n

It becomes

25000 ± 1.96 × 2500/√400

= 25000 ± 1.96 × 125

= 25000 ± 245

The lower end of the confidence interval is 25000 - 245 =24755

The upper end of the confidence interval is 25000 + 245 = 25245

Therefore, with 95% confidence interval, the mean salary of all graduates from the English department is between $24755 and $25245

3 0

2 years ago

The coordinate values of the vertices of △klm are integers. triangle klm has vertices located at (1, 1), (5, 4) and (5, 1). whic

worty [1.4K]

The rest of the queastion is :
<span> A) (-1, 1), (-1, 4), (2, 1)
B) (0, 0), (3, 4), (0, 5)
C) (-1, 1), (-4, 5), (-1, 5)
D) (0, 0), (-5, 0), (0, 4)
==============================
</span>

<span>The distance between two points (x₁,y₁),(x₂,y₂) = d
$d = \sqrt{ (x2-x1)^{2} + (y2-y1)^{2} }$ </span>

we have <span>K(1, 1), L(5, 4) and M(5, 1)
we will find the length between each two points.
KL = </span><span> $d = \sqrt{ (5-1)^{2} + (4-1)^{2} }$ = 5
</span>LM = <span> $d = \sqrt{ (5-5)^{2} + (1-4)^{2} }$ = 3
KM = </span><span> $d = \sqrt{ (5-1)^{2} + (1-1)^{2} }$ = 4

now check each group from the choices
the group that will give the same result will be the correct choice.
</span>The correct choice is C
<span>C) (-1, 1), (-4, 5), (-1, 5)

check the answer;
</span><span>K'(-1, 1), L'(-4, 5), M'(-1, 5)
</span>
<span>K'L' = <span> $d = \sqrt{ (-4+1)^{2} + (5-1)^{2} }$ = 5
</span>L'M' = <span> $d = \sqrt{ (-1+4)^{2} + (5-5)^{2} }$ = 3
K'M' = </span><span> $d = \sqrt{ (-1+1)^{2} + (5-1)^{2} }$ = 4</span></span>

6 0

2 years ago

A company has 125 personal computers. The probability that any one of them will require repair on a given day is 0.15.

mariarad [96]

Answer:

a. the probability that any one of the computers will require repair on a given day is constant

Step-by-step explanation:

The following properties must be true in order for a distribution to be binomial:

- A fixed number of trials (125 computers)

- Each trial is independent of the others (one computer requiring repair does not interfere with the likelihood of another requiring repair).

There are only two outcomes (requires repair or do not require repair)

The probability of each outcome remains constant from trial to trial (All computers have the same likelihood of requiring repair, 0.15).

Therefore, the alternative that better fits those properties is alternative a. the probability that any one of the computers will require repair on a given day is constant

8 0

2 years ago

Simplify!!! <br><br>I need help please

satela [25.4K]

Answer:

$\frac{4^{21}}{5^{6}}$

Step-by-step explanation:

$\frac{4^{7*3}}{5^{2*3}}=\frac{4^{21}}{5^{6}}$

3 0

2 years ago

Jesse and Mark are jogging along the route shown at a rate of 12 miles per hour. They start by jogging south along Capitol Stree

Ilya [14]

The hypotenuse of the way that they have taken is equal to 2 miles. Jogging this distance with a rate of 5 miles per hour will take Jesse 0.4 hours. Further, for Mark to be back to the starting point, the total distance covered is 2.75. Dividing the distance by 12 miles per hour, it will take Mark only 0.23 hours. Thus, Mark will reach the initial point first.

4 0

2 years ago

Read 2 more answers