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2 years ago

The length of Marianna's dress measures 1 1/4 yards. She hems the dress, makint it 3/8 yard shorter. How long is her dress now?

Mathematics

1 answer:

ser-zykov [4K]2 years ago

6 0

Answer:

7/8 yards

Step-by-step explanation:

1 1/4- 3/8

first change 1 1/4 to an improper fraction: 5/4

next, find common denominator which is 8

5/4=10/8

10/8-3/8=7/8

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SOMEONE HELP ME please

olga nikolaevna [1]

Answer:

the first and second one

Step-by-step explanation:

the two last ones go over budget

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1 year ago

How can you use two-way tables to solve for probabilities?

Alona [7]

Answer:

A two-way table is a way to organise data about two specific variables. This example shows a two-way table where the variables are gender and favourite sport.

Step-by-step explanation:

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2 years ago

The money m (in £) Xavier has to spend each week is his wage w (in £) subtract the tax t (in £) he pays on his income. Enter a f

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Answer: The answer is given below

Step-by-step explanation:

From the question, we are informed that the money m (in £) Xavier has to spend each week is his wage w (in £) subtract the tax t (in £) he pays on his income. Therefore, the formula for the money he can spend will be:

m = w - t

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2 years ago

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2 years ago

The mean annual inflation rate in the United States over the past 98 years is 3.37% and has a standard deviation of approximatel

Ksenya-84 [330]

Answer:

38.59% probability that inflation rate will be below 1.9% in 2019

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 3.37, \sigma = 5$

If the annual inflation rate is normally distributed, what is the probability that inflation rate will be below 1.9% in 2019?

This is the pvalue of Z when X = 1.9. So

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{1.9 - 3.37}{5}$

$Z = -0.29$

$Z = -0.29$ has a pvalue of 0.3859

38.59% probability that inflation rate will be below 1.9% in 2019

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2 years ago