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3 years ago

6. What number added to 145 results in zero?

Mathematics

2 answers:

Nookie1986 [14]3 years ago

6 0

Answer:

$-145$

Step-by-step explanation:

Let n represent our required number.

We are asked to find the number that when added to 145 results in zero.

The number added to 145 would be $n+145$ .

The number added to 145 results in 0 would be:

$n+145=0$

Let us solve for n.

$n+145-145=0-145$

$n=-145$

Therefore, $-145$ added to 145 results in 0.

VMariaS [17]3 years ago

4 0

The number is -145.
145 + -145 = 0
**
Adding -145 is the same as subtracting 145.
And as a bonus fact: adding 145 is the same as subtracting -145.
Addition and subtraction are really the same thing.
So are multiplication and division.

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schepotkina [342]

Answer:

a) Alternative hypothesis: the use of the coupons is isgnificantly higher than 10%.

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The null and alternative hypothesis can be written as:

$H_0: \pi=0.1\\\\H_a:\pi>0.1$

b) Point estimate p=0.13

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Step-by-step explanation:

The question is incomplete.

The sample data shows that x=13 out of n=100 use the coupons.

This is a hypothesis test for a proportion.

The claim is that the proportion of coupons use is significantly higher than 10%.

Then, the null and alternative hypothesis are:

$H_0: \pi=0.1\\\\H_a:\pi>0.1$

The significance level is 0.05.

The sample has a size n=100.

The point estimate for the population proportion is the sample proportion and has a value of p=0.13.

$p=X/n=13/100=0.13$

The standard error of the proportion is:

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Then, we can calculate the z-statistic as:

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Give the answer please

Nataliya [291]

The inverse of a function is given as √x - 1

<h3>Inverse of a function</h3>

To get the inverse of any function f(x) we need to ensure that it passes the horizontal line test.

Given the following function

f(x) = (x+1)^2

Let y= f(x) to have:

y = (x+1)^2

Replace y with x to have:

x = (y+1)^2

Make y the subject of the formula

√x =y + 1

Subtract 1 from both sides

√x - 1 = y

Swap

y = √x - 1

Hence the inverse of a function is given as √x - 1

Learn more on inverse of a function here: brainly.com/question/3831584

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