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2 years ago

100 POINTS!!!

Mathematics

2 answers:

vladimir2022 [97]2 years ago

3 0

7.76 is your answer

a_sh-v [17]2 years ago

3 0

<h3>Answer: B. $7.76</h3>

=========================================

Explanation:

Ignore the info about how much Margo spent.

Anthony spent $10.24 on lunch, before the tip. Then we add on the $2 tip to get a total of 12.24 dollars spent.

The amount of change is 20-12.24 = 7.76

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Here's how the cashier can mentally figure out how much change to give

Start with the number of cents from $12.24

The jump from 24 cents to 100 cents is 76 cents (24+76 = 100)

This gets us from 12.24 to 13.00

The jump from 13 to 20 is another 7 dollars.

So that's how we get 7 + 0.76 = 7.76 in change

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blagie [28]

Step-by-step explanation:

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3 years ago

How many solutions does 3 (y-2) = 3y - 6 have

Marrrta [24]

Answer:

Infinitely many solutions

Step-by-step explanation:

Simplify this

3 (y-2) = 3y-6

3 (y) + 3 ( -2) = 3y-6

3y-6=3y-6

Because these two equations are equal to each other, it is infinitely many solutions.

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3 years ago

What is the volume to the nearest tenth

lys-0071 [83]

Answer:

Step-by-step explanation:

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3 years ago

What is the simplified expression for the expression below<br> 4(3x-2)+ 6x(2-1)

kozerog [31]

Answer:

18x - 8

Step-by-step explanation:

First, distribute the 4 to the first set of parentheses:

4(3x - 2) + 6x(2 - 1)

12x - 8 + 6x(2 - 1)

Then, simplify the second set of parentheses:

12x - 8 + 6x(1)

Simplify and add like terms:

12x - 8 + 6x

18x - 8 is the simplified expression

4 0

3 years ago

Given values: 54, 65, 76, 43, 45, 76, 87 12, 23, 34, 67,65, 78, 45, 34. Given 95% confidence and sigma (population standard devi

Brums [2.3K]

Answer:

Option (D) None of the above.

Step-by-step explanation:

We are given the following data:

54, 65, 76, 43, 45, 76, 87, 12, 23, 34, 67,65, 78, 45, 34

Formula:

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

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean =\displaystyle\frac{804}{15} = 53.6$

Sum of squares of differences = 0.16 + 129.96 + 501.76 + 112.36 + 73.96 + 501.76 + 1115.56 + 1730.56 + 936.36 + 384.16 + 179.56 + 129.96 + 595.36 + 73.96 + 384.16 = 6849.6

$S.D = \sqrt{\frac{6849.6}{15}} = 21.4$

Confidence interval:

$\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$z_{critical}\text{ at}~\alpha_{0.05} = 1.96$

$53.6 \pm 1.96(\frac{21.4}{\sqrt{15}} ) = 53.6 \pm 10.83 = (42.8,64.4)$

8 0

3 years ago