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3 years ago

Your friend shows you a coin collection. In it 45/50 of the coins are quarters. what percent of the coins are quarters?

Mathematics

2 answers:

Ksenya-84 [330]3 years ago

8 0

Answer:

90% of them are quarters.

Step-by-step explanation:

If you take 50 and multiply it by two, you get 100. But, in order to get the right number, you have to multiply 45 by two as well. 45 x 2 is 90. 90 out of 100 is 90 percent. So 90% is the answer.

Setler [38]3 years ago

6 0

90% because to find 100% in this fraction you will have to multiply to bottom to get one hundred thus having to do the same to the top getting 90 out of one hundred.

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zaharov [31]

Answer:

7 ÷ 5

Step-by-step explanation:

1/5 of 7 is equal to 1/5 times 7/1, which will simplify to 7/5, or 7 ÷ 5.

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Answer:

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2 years ago

A boy spends 4/15 on cloth, 1/5 on food and 5/12 on drink. what fraction is left for other things

mamaluj [8]

Answer:

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3 years ago

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Write in slope-intercept form an equation of the line that passes through the points (−1,12) and (1,2).

zzz [600]

Answer:

$y=-5x+7$

Step-by-step explanation:

step 1

Find the slope

The formula to calculate the slope between two points is equal to

$m=\frac{y2-y1}{x2-x1}$

we have

the points (−1,12) and (1,2)

substitute

$m=\frac{2-12}{1+1}$

$m=\frac{-10}{2}$

$m=-5$

step 2

we know that

The equation of the line in slope intercept form is equl to

$y=mx+b$

where

m is the slope

b is the y-intercept

we have

$m=-5$

$point\ (1,2)$

substitute in the linear equation and solve for b

$2=-5(1)+b$

$b=2+5=7$

therefore

$y=-5x+7$

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3 years ago

The cost of manufacturing x refrigerators is given by the function f(x)=2x^2+6000. If the cost doubles fr the year 2011 owing to

Alecsey [184]

Answer: Vertical Stretch

Step-by-step explanation:

Given: The cost of manufacturing x refrigerators is given by the function : $f(x)=2x^2+6000$

If the cost doubles fr the year 2011 owing to higher raw material prices, then we multiply the given function by 2, then we get a new function :

$g(x)=2(2x^2+6000)=4x^2+12000$ which represents a vertical stretch in the graph.

∵ 2 is a positive constant greater than 1 which is multiplied to the parent function f(x). So by the definition of vertical stretch the parent function will be vertically stretched .

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3 years ago