# A store sells 12-packs of ballpoint pens for \$1.09 each and composition books for \$2.79 each. Cindy buys m packs of ballpoint pens and n composition books. The store offers a 5% discount for every 50th customer who makes a purchase. If Cindy gets the 5% discount, which expression will represent Cindy’s bill? 0.05 − 1.09m + 2.79n 1.05 + 1.09m + 2.79n 1.05(1.09m + 2.79n) 0.95(1.09m + 2.79n)

Answer: The expression that represents Cindy´s bill is 0.95(1.09m + 2.79n).

Step-by-step explanation:

Hi, to find the correct expression we have to analyze the information given:

Packs of ballpoint pens = m

Price of ballpoint pens=\$1.09 each

Composition books= n

Price of composition books = \$2.79 each

Discount 5%

Cindy buys m packs of ballpoint pens and n composition books. To represent this statement in an equation we have to multiply each quantity of the items bought by the price of each item.

So, mathematically speaking

1.09m + 2.79n

Now, to apply the 5% percent discount we have to multiply the whole expression by 0.95.

0.95(1.09m + 2.79n)

In conclusion, the expression that represents Cindy´s bill is 0.95(1.09m + 2.79n).

Feel free to ask for more if it´s necessary or if you did not understand something.

Since you get a 5% discount you only have to pay 95% of the regular price hence the .95(....

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6/40 ; Simplified: 3/20

Step-by-step explanation:

Multiply the two fractions. Note that when multiplying, you do not need common denominators. Multiply straight across.

3/10 * 2/4 = 6/40

Simplify if needed. Divide common factors from both the numerator and denominator.

(6/40)/(2/2) = 3/20

~

Explanation,

Hope This Helps :-)

A certain brand of automobile tire has a mean life span of 32,000 miles and a standard deviation of 2,450 miles.​ (Assume the life spans of the tires have a​ bell-shaped distribution.) ​(a) The life spans of three randomly selected tires are 34,000 ​miles, 37,000 ​miles, and 31,000 miles. Find the​ z-score that corresponds to each life span.

a)

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The z-score corresponds to 37000 is 2.041

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Step-by-step explanation:

The z-score corresponds to 34000

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