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3 years ago

15 times as much as 1 fifth of 12

2 answers:

8 0

1) Work out what 1/5 of 12 is
To do this, we divide 12 by 5
12/5 = 2.4

2) Multiply 2.4 by 15
2.4 x 15 = 36

If you don't like decimals, you can also do it this way...

This can be rewritten as 15 x 1/5 x 12
Multiplications alone can be performed in any order

1) Work out what 1/5 of 15 is
1/5 of 15
15/5 = 3

2) 3 multiplied by 12
3 x 12 = 36

Lunna [17]3 years ago

3 0

1/5 of 12 as much as 15 times = 36

Further Explanation:

The question given is an example of Number problems. Two major components of mathematical tools would be used to derive answers to similar problem like this. They are Multiplication and Division. Also the given question has an element of Fraction in it.

Fraction can be referred to as a number that has a part of a whole. It always has a numerator and denominator. Numerators are number values that are always on top, while denominators are number values that are always at the bottom. For example 2/4, 54/34

Multiplication can be defined as a process of multiplying several numbers to derive a particular number value(s). It is the process of adding numbers repeatedly in multiple folds. And two or more numbers are usually used to derive further values. And it is usually denoted as “times”. For example 2 x 3 = 6, 2 x 4 x 3 = 24

Division is the process of dividing or splitting number values into several equal parts. Of

Solution:

1 fifth of 12 can be written as 1/5 of 12, and can also be expressed as 1/5 x 12

Since 1/5 is a fraction, and must be multiplied by 12 then…

12 would be multiplied by 1, and then divided by 5 to get another number values

Therefore,

1/5 x 12 = 12/5

= 2.4

Recall 15 times as much as 1/5 of 12

Since 1/5 of 12 = 2.4

Therefore

15 x 2.4 = 36

LEARN MORE:

Numbers brainly.com/question/953655#

KEYWORDS

Numbers
Fraction
Multiplication
Division
Times

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nikitadnepr [17]

The answer is
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so y = 3(x/2) -1
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5 0

3 years ago

-9 + 10 over 4 equals negative 7

umka21 [38]

-9 + 10 over 4 = -7

1/4 = -7

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3 years ago

At a large Midwestern university, a simple random sample of 100 entering freshmen in 1993 found that 20 of the sampled freshmen

guajiro [1.7K]

Answer:

The 90% confidence interval for the difference of proportions is (0.01775,0.18225).

Step-by-step explanation:

Before building the confidence interval, we need to understand the central limit theorem and subtraction of normal variables.

Central Limit Theorem

The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For a proportion p in a sample of size n, the sampling distribution of the sample proportion will be approximately normal with mean $\mu = p$ and standard deviation $s = \sqrt{\frac{p(1-p)}{n}}$

Subtraction between normal variables:

When two normal variables are subtracted, the mean is the difference of the means, while the standard deviation is the square root of the sum of the variances.

p1 -> 1993

20 out of 100, so:

$p_1 = \frac{20}{100} = 0.2$