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nignag [31]
2 years ago
8

Help please... ASAP ! Show your workings! Irrelevant answers will be reported!

Mathematics
2 answers:
Evgen [1.6K]2 years ago
7 0
D is 6, 6 and E is -4, -1
Igoryamba2 years ago
5 0

Answer:

point D is 6,6

point E is -4,-1

Step-by-step explanation:

No need for workings,its clear,please mark brainliest.

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The weekly earnings of students in one age group are normally distributed with a standard deviation of 47 dollars. A researcher
ELEN [110]

Answer:

Option D) 340

Step-by-step explanation:

We are given the following in the question:

Alpha, α = 0.05

Population standard deviation, σ = $47

Margin of error = 5

95% Confidence Interval:

\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}

\text{Margin of error} = z_{critical}\frac{\sigma}{\sqrt{n}}

Putting the values, we get,

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

5 = 1.96(\dfrac{47}{\sqrt{n}} )\\\\\sqrt{n} = \dfrac{47\times 1.96}{5}\\\\n = 339.443776\\\Rightarrow n \approx 340

Thus, the correct answer is

Option D) 340

7 0
3 years ago
What is an equation of the line that passes through the points (-8,-6) and<br> (3, – 6)?
Maksim231197 [3]

Answer:

y=-6

Step-by-step explanation:

The y value isn't changing when the x value does. This means there is no rate of change or gradient. So in y=mx+c m=0 so we get y=c, c is always -6.

6 0
3 years ago
Solve the equation without the use of a calculator. please Help!!! Thank you!!!<br> 5=2x^2+3
Olin [163]
Solving for X.

5 = 2x^2 + 3 Subtract 3 from both sides.

2 = 2x^2 Divide by 2 on both sides.

1 = x^2 Take the square root of both sides.

X = 1
8 0
3 years ago
75% of the Spanish Club is boys . If there are 36 members in the Spanish club, how many are girls?
7nadin3 [17]
48 i know because i used a calculator
3 0
3 years ago
There is a new student in class and you have been asked to teach them everything you know about coordinate planes. **Write at le
Simora [160]

Step-by-step explanation:

The coordinate plane is a two-dimension surface formed by two number lines. One number line is horizontal and is called the x-axis. The other number line is vertical number line and is called the y-axis. The two axes meet at a point called the origin. We can use the coordinate plane to graph points, lines

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2 years ago
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