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2 years ago

Someone help please

Mathematics

1 answer:

Vlad1618 [11]2 years ago

3 0

Answer:

Step-by-step explanation:

ok if it was a normal rectangle =

8 x 6

but the middle part takes 4 from the middle

since there are 2 rectangle

4/2 = 2

since there are lines

6 x 2 = 12 + another 12 since the rectangle on the bottom is the same as the top

24 + ...

6 - 4

2 x 4 = 8

24 + 8 =

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Please help me with questions 30 and 32 with work shown

PSYCHO15rus [73]

For number 30. Your answer is 17.19. 54/3.14 = 17.19, an for number 32. Your answer is 15.28. 48/3.14 = 15.28.

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3 years ago

In a random sample of microwave ovens, the mean repair cost was $ and the standard deviation was $. Using the standard normal

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Complete Question

In a random sample of 13 microwave ovens, the mean repair cost was $90.00 and the standard deviation was $15.20. Using the standard normal distribution with the appropriate calculations for a standard deviation that is known, assume the population is normally distributed, find the margin of error and construct a 98% confidence interval for the population mean u. A 98% confidence interval using the t-distribution was (78.7,101.3). Compare the results. The margin of error of u is

Answer:

The value is $E = 11.65$

Step-by-step explanation:

From the question we are told that

The sample is $n = 13$

The sample mean is $\= x = \$ 90$

The standard deviation is $\sigma = \$ 15.20$

The lower limit of the 98% confidence interval is $a = 78.7$

The upper limit of the 98% confidence interval is $b = 101.3$

Generally the margin of error is mathematically represented as

$E = \frac{b-a}{2}$

=> $E = \frac{ 101.3 - 78 }{2}$

=> $E = 11.65$

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2 years ago

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Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Solve the system of equations below by graphing both equations with a pencil and paper. What is the solution? y = x+1 1 X+ 3 2.

Troyanec [42]

Answer:

D. (4, 5)

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS
Equality Properties

Algebra I

Solving systems of equations using substitution/elimination
Solving systems of equations by graphing

Step-by-step explanation:

Step 1: Define systems

y = x + 1

y = 1/2x + 3

Step 2: Solve for x

Substitute in y: x + 1 = 1/2x + 3
Subtract 1/2x on both sides: 1/2x + 1 = 3
Subtract 1 on both sides: 1/2x = 2
Divide both sides by 1/2: x = 4

Step 3: Solve for y

Define original equation: y = x + 1
Substitute in x: y = 4 + 1
Add: y = 5

Step 4: Graph

We can confirm our answer.

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2 years ago