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Anna11 [10]
3 years ago
7

You have 15 coins in your pocket that are quarters or nickels. They total $2.75. How many of each coin do you have?

Mathematics
1 answer:
azamat3 years ago
4 0

Answer: There are 5 nickels and 10 quarters.

Step-by-step explanation:

Let x = Nickels , y= Quarters.

Then x+y = 15

⇒ y=15-x  (i)

1 nickel =  5 cents , 1 quarter = 25 cents

$2.75 = 275  cents    [ 1 dollar = 100 cents ]

Then, 5x+25y= 275    (ii)

Substitute value of y from (i)

5x+25 (15-x)=275

⇒ 5x + 375 - 25x =275

⇒ -20x= 275-375

⇒ -20x= -100

⇒  x = 5   [divide both sides by -20]

Put this in (i) , we get y= 15-5=10

Hence, there are 5 nickels and 10 quarters.

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4 years ago
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larisa86 [58]

The list that orders the fractions from least to greatest is:

  • \frac{7}{12}, \frac{2}{3}, \frac{17}{24}, \frac{3}{4}

<h3>Ordering of fractions</h3>
  • To order the fractions from least to greatest, we have to realize their conversion to decimal.
  • To realize the conversion, the numerator is divided by the denominator, as ordering decimal numbers are easier than fractions.

Hence, the fractions converted to decimal are:

  • \frac{2}{3} = 0.6667.
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  • \frac{17}{24} = 0.7083
  • \frac{3}{4} = 0.75

Hence, the list from least to greatest is, according to the results of the conversions:

  • \frac{7}{12}, \frac{2}{3}, \frac{17}{24}, \frac{3}{4}

To learn more about ordering of fractions, you can take a look at brainly.com/question/26139168

7 0
3 years ago
A<br> 4 x 3w<br> B<br> 5 - 4r<br> C<br> 8 ÷÷ 4p<br> D<br> 4 ÷÷ 2y
Dovator [93]

Answer:

ok?

Step-by-step explanation:

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3 years ago
PLEASE HELP ! (EASY)<br><br> (x-7)^3 (x+2)^2 (x-13) &lt;0<br><br> what are the possible values of x?
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4 years ago
Describe the graph of the function.y = |x – 4| – 7
juin [17]
This is always ''interesting'' If you see an absolute value, you always need to deal with when it is zero:

(x-4)=0 ===> x=4,

so that now you have to plot 2 functions!

For x<= 4: what's inside the absolute value (x-4) is negative, right?, then let's make it +, by multiplying by -1:

|x-4| = -(x-4)=4-x
Then:

for x<=4, y = -x+4-7 = -x-3

for x=>4, (x-4) is positive, so no changes:

y= x-4-7 = x-11,

Now plot both lines. Pick up some x that are 4 or less, for y = -x-3, and some points that are 4 or greater, for y=x-11

In fact, only two points are necessary to draw a line, right? So if you want to go full speed, choose:

x=4 and x= 3 for y=-x-3

And just x=5 for y=x-11

The reason is that the absolute value is continuous, so x=4 works for both:

x=4===> y=-4-3 = -7

x==4 ====> y = 4-11=-7!

abs() usually have a cusp int he point where it is =0

Hope it helps, despite being this long!
3 0
3 years ago
Read 2 more answers
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