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3 years ago

Sam paid $8.28 for 18 stamps.at this rate,how much would it cost Sam to buy 12 stamps

Mathematics

2 answers:

Charra [1.4K]3 years ago

6 0

$5.52 @ 46 cents a stamp

allsm [11]3 years ago

3 0

Answer: It costs $5.52 to Sam to buy 12 stamps.

Step-by-step explanation:

Given: Sam paid $8.28 for 18 stamps.

Thus, the cost of 18 stamps = $8.28

Then the cost of 1 stamp= $\frac{8.28}{18}$

Thus, the cost of 1 stamp=$0.46

With the same rate , the cost of 12 stamps= $0.46\times12$

Therefore, the cost of 12 stamps= $5.52

hence, it costs $5.52 to Sam to buy 12 stamps.

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A map that has a scale of 3 cm: 18 km. If Riverside and Smithville are 54km apart then they are how far apart on the map?

SVETLANKA909090 [29]

Setting up the ratio, you get 3/18=x/54. Solve the proportion, you get that Riverside and Smithville are 9 cm apart on the map.

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3 years ago

Simplify the following expression 4x + 3t - 2x- 4

allochka39001 [22]

Answer:

2x + 3t - 4

Step-by-step explanation:

Hi,

To simplify the expression, we must combine like terms. To start, let's combine all of the x-values.

4x + 3t - 2x - 4

When we combine 4x and -2x we get 2x.

2x + 3t - 4

We can't combine anything else. They don't have the same variables and 4 doesn't even have a variable, so 2x + 3t -4 is the simplified expression.

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3 years ago

Sam really wanted to buy a car, but did not have the money at the moment. He was talking to the salesman and they said that he c

wolverine [178]

Answer:

1) $30,821 ( loan balance after 3 months in )

2) 8.56%

Step-by-step explanation:

Final Amount of compound interest: A = P ( 1 + i ) ^ n

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r = interest rate = 11.41% = 0.1141

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2) Loan Balance after 1 year

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2 years ago

Mrs. Alberts built a pen for her dogs. The pen was 12.5 feet by 7 feet and had a concrete floor. If the concrete floor costs $12

dybincka [34]

Answer: Mrs. Alberts spent $1,050 on the floor.

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We know that it costs $12 per square foot, and we have 87.5 square feet.

So, multiply 12 by 87.5 to find the cost that Mrs, Alberts will spend on the floor.

12 x 87.5 = 1050, or $1,050 for the total area of the floor.

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3 years ago

There is a machine with 8 toys in it that each cost between 25 cents and 2 dollars, with each toy being 25 cents more expensive

aksik [14]

It is actually quite simple: they are asking for the probability:

there are different types of items and each types there is always at least a 25 cent difference in between (if you go up the or down the scale there will be a 25 cent difference to each type of item. They say that Sam wants to get one of the 8 items. The price at this point doesn't matter. If he wants 1 of the 8 types all you have to do is convert it into a fraction: 1/8. That is the answer

Hope I helped...

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3 years ago