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3 years ago

Which decimal is equivalent?

Mathematics

1 answer:

Alina [70]3 years ago

6 0

Answer:

It is B

Step-by-step explanation:

Because you divided 1÷3 and you get 0.3333333333

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Last week, Latoya drove 259 miles. This week, she drove k miles. Using k, write an expression for the total number of miles she

swat32

Answer:

259+k=x

Step-by-step explanation:

x= total number of miles

3 0

2 years ago

URGENT DUE BY 3:30 FOR A HUGE GRADE WILL RATE GOOD:)

mariarad [96]

A = L x W

20 x 20 = 400.

400 x 8 = 3200

4 0

3 years ago

Lazurus Steel Corporation produces iron rods that are supposed to be 36 inches long. The machine that makes these rods does not

Igoryamba

Answer:

Step-by-step explanation:

We would construct a confidence interval.

Confidence interval is written in the form,

(Sample mean - margin of error, sample mean + margin of error)

The sample mean, x is the point estimate for the population mean.

Since the sample size is large and the population standard deviation is known, we would use the following formula and determine the z score from the normal distribution table.

Margin of error = z × σ/√n

Where

σ = population standard Deviation

n = number of samples

From the information given

x = 36.02 inches

σ = 0.1 inches

n = 40

To determine the z score, we subtract the confidence level from 100% to get α

α = 1 - 0.99 = 0.01

α/2 = 0.01/2 = 0.005

This is the area in each tail. Since we want the area in the middle, it becomes

1 - 0.005 = 0.995

The z score corresponding to the area on the z table is 2.58. Thus, confidence level of 99% is 2.58

Margin of error = 2.58 × 0.1/√40 = 0.041

Confidence interval = 36.02 ± 0.041

The lower end of the confidence interval is

36.02 - 0.041 = 35.979 inches

The upper end of the confidence interval is

36.02 - 0.041 = 36.061 inches

Since 36.061 > 36.05, then we would conclude that the machine needs an adjustment.

The formula used is

Confidence interval =

Sample mean ± z × σ/√n

7 0

3 years ago

3. How many solutions does the system of equations have?

miskamm [114]

Answer:

oof i dont know this

Step-by-step explanation:

5 0

3 years ago

Can anyone answer this please i need to be for sure I’m right

Genrish500 [490]

The answer to this question is B, (-infinity, -28].

We can get this answer by first multiplying each side of the inequality by 7. That would get rid of the fraction. When one does that, the result is d + 28 $\leq$ 0. That means that d $\leq$ -28. In interval notation, which is the notation the problem is asking us, that would be (-infinity, -28], since d is all values less than -28 this includes infinity, but it also includes -28, so there is a ] around it. That means that the answer to this question is B, (-infinity, -28].

7 0

3 years ago