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2 years ago

Your resturaunt bill is 42$ you want to leave a 15% tip, what should the tip be

Mathematics

2 answers:

aivan3 [116]2 years ago

7 0

Answer:

The tip should be $6.30

Step-by-step explanation:

We can find 15 percent of 42$ by multiplying 42 by 0.15 (this is another way of writing down 15%) and so we get...

(42)(0.15) = 6.3

Therefore the tip should be $6.30

cluponka [151]2 years ago

6 0

Answer:

$6.30

Step-by-step explanation:

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sashaice [31]

Answer:

It cannot be solved furthur bro as the value of x is unspecified

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3 years ago

Please help worth 30 points it’s geometry.

Lyrx [107]

That would be a 45 degree angle

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2 years ago

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X-Y=5, 6X-6Y =?

denis-greek [22]

Answer:

Step-by-step explanation:

And yes, you thought it through correctly. 6(X-Y) = 6*5

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2 years ago

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A manufacturer of college textbooks is interested in estimating the strength of the bindings produced by a particular binding ma

IrinaVladis [17]

Answer:

538 books should be tested.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.99}{2} = 0.005$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.005 = 0.995$ , so $z = 2.575$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

How many books should be tested to estimate the average force required to break the binding to within 0.08 lb with 99% confidence?

n books should be tested.

n is found when $M = 0.08$

We have that $\sigma = 0.72$

$M = z*\frac{\sigma}{\sqrt{n}}$

$0.08 = 2.575*\frac{0.72}{\sqrt{n}}$

$0.08\sqrt{n} = 2.575*0.72$

$\sqrt{n} = \frac{2.575*0.72}{0.08}$

$(\sqrt{n})^{2} = (\frac{2.575*0.72}{0.08})^{2}$

$n = 537.1$

Rounding up

538 books should be tested.

6 0

2 years ago

The sum of 1/3 and twice a number is equal to 2/3 subtracted from three the number.find the number

Zigmanuir [339]

The number = y

2y + 1/3 = 2/3 - 3y
(add 3y to both sides)
5y + 1/3 = 2/3
(subtract 1/3 from both sides to isolate y)
5y = 1/3
(divide by 5)
y = 1/15

4 0

3 years ago