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2 years ago

6

If brad is x years old and Julie is five years younger than brad how old is Julie

1 answer:

zlopas [31]2 years ago

4 0

Using algebraic expression, we can state that Julie is (x - 5) years old.

<h3>How to Express a Word Problem in Algebraic Expressions?</h3>

Algebraic expressions can be defined as a mathematical expression which helps to simplify a given statement or word problem. Variables, operation sign, and numbers are used.

Given the following:

The age of brad is x years old

We are told that Julie is five (5) years younger than brad. This means that Julie's age is 5 less than the age of Brad. This can be expressed in algebraic expression as:

x - 5

Therefore, we can state that Julie is (x - 5) years old.

Learn more about algebraic expression on:

brainly.com/question/12470265

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3 years ago

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It does not appear that, as a group, the students are reasonably good at estimating one minute.

Step-by-step explanation:

We are given the following data in the question:

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$\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}$

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Alpha, α = 0.10

Sample standard deviation, s = 18.39 minutes

First, we design the null and the alternate hypothesis

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We use Two-tailed t test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }$

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Calculating the p-value from the table, we have,

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Since the p-value is lower than the significance level, we fail to accept the null hypothesis and reject it. We accept the alternate hypothesis.

Thus, we conclude that it does not appear that, as a group, the students are reasonably good at estimating one minute.

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