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zavuch27 [327]
3 years ago
12

Karen purchased a prepaid phone card for $30. Long distance calls cost 16 cents a minute using this card. Karen used her card on

ly once to make a long distance call. If the remaining credit on her card is $24.08, how many minutes did her last call last?
Mathematics
1 answer:
Sedbober [7]3 years ago
3 0

30-24.08=5.92, 5.92/.16=37 minutes

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a container is filled with 100 grams of bird feed that is 80% seed. How many grams of bird feed containing 5% seed must be added
Fofino [41]
Um 20% at least i think

6 0
4 years ago
If 5 slices of pizza cost $5:50 how much does 
kupik [55]

The first thing we must do for this case is to define variables.

We have then:

x: number of slices

y: total cost

We write the linear function that relates the variables.

We have then:

y = (\frac{5.50}{5}) * x

Then, we evaluate the number of slices to find the total cost.

-two slices cost:

We substitute x = 2 in the given equation:

y = (\frac{5.50}{5}) * 2\\y = 2.2

Answer:

two slices = 2.2 $

-ten slices cost:

We substitute x = 10 in the given equation:

y = (\frac{5.50}{5}) * 10\\y = 11

Answer:

ten slices = 11 $

-half a slice cost:

We substitute x = 1/2 in the given equation:

y = (\frac{5.50}{5}) * \frac{1}{2}\\y = 0.55

Answer:

half a slice = 0.55 $

6 0
3 years ago
Which graph represents the piecewise-defined function? y={−45x−3   if  x<03x−10   if  x≥2
Nikitich [7]

Step-by-step explanation:

y=\left \Bigg\{ {\big{-45x-3 \qquad x < 0} \atop \big{3x - 10 \qquad x \geq2 }} \right.

\begin {array}{c|c}{ x&y}}\\ -\infty&-\infty\\-2&-93\\-1&-48\\ 0 &-3^*\\1&nothing\\2&-4\\3&-1\\4&2\\ \infty&\infty\\\end{array}

* open dot

You did not provide the graphs to choose from so use the table above to determine which graph fits those coordinates.

Make sure that:

  • (0, -3) has an open dot
  • nothing is plotted between x = 0 and x = 2
  • (2, -4) has a closed dot
3 0
3 years ago
Out of 27 participants in a track race, 5 are from China, 4 from the U.S.A., 3 each from the U.K. and Russia, and the rest from
son4ous [18]
I think it is 4 out of 5 but i dont know the number to the nearest thousanths 
but i hope this helps
4 0
3 years ago
Given the function f(x)= √x+7, find the value of x when f(x)=1
solniwko [45]
F(x) = 1, so we make the entire equation equal 1.

1 = sqrt(x) + 7

To make x by itself subtract 7 from both sides

-6 = sqrt(x)

Square both sides to remove sqrt from x.

36 = x

The value of x is 36
7 0
3 years ago
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