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Bogdan [553]
3 years ago
10

You want to buy three books that are on sale at 20% off. The original prices of the books are $2.50, $4.95, and $6.00. How much

will you save?
I was hoping someone could help me do this in the distributive property. I'm a bit confused about how to do it with the distributive property however I know how to do it without.
Mathematics
1 answer:
Veseljchak [2.6K]3 years ago
5 0

Answer:

$2.69

Step-by-step explanation:

The original prices of the books are $2.50, $4.95, and $6.00.

You want to buy three books that are on sale at 20% off (or 0.2 as decimal).

In total, you'll save:

0.2\cdot \$2.50+0.2\cdot \$4.95+0.2\cdot \$6

Uce distributive property:

0.2\cdot \$2.50+0.2\cdot \$4.95+0.2\cdot \$6\\ \\=0.2\cdot (\$2.50+\$4.95+\$6.00)\\ \\=0.2\cdot \$13.45\\ \\=\$2.69

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First, find the slope for the line. Choose any 2 points and note their coordinates. I'll take (0,4) and (2,10) as an example. Then you apply your formula, remembering each coordinate comes in the form of (x,y).

\frac{y2-y1}{x2-x1} = \frac{(10)-(4)}{(2)-(0)} = \frac{6}{2} = 3\\

The slope (m) is 3.

In this case, the slope represents the price per kilometer.

So, the fare is $3 per kilometer + the base fare, which is the value already present at 0km. According to the graph, when x=0, y=4.

Let's assume the following:

p = Price per Kilometer, b = Base Fare, k = Amount of Kilometers, t = Total Cost

The total fare would be calculated by the following formula:

(p*k)+b

Using the given values:

p=3,b=4,k=6\\\\t=(3*6)+4\\t=18+4\\t=22

In conclusion, the total cost for 6km is $22. Option A.

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Step-by-step explanation:

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Step-by-step explanation:

Significant figures are any number but zeroes.

However, in some cases, zeroes also count as significant figures.

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This is multiplying the number by 10 each time. In other words, just adding an extra zero to the end of it. 

b. 340, 0.034 

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