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g100num [7]
3 years ago
9

$48The cost, c, of a ham sandwich at a deli varies directly with the number of sandwiches, n. If c = $54 when n is 9, what is th

e cost of the sandwiches when n is 3?
$18
$21
$27
$48
Mathematics
1 answer:
crimeas [40]3 years ago
3 0

Answer:

c=18

Step-by-step explanation:

54 divided by 9 is 6

6 times 3 is 18

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Select the correct answer from each drop-down menu.
irakobra [83]

Answer:

The length of side AC is 5 units.

The areas of triangle ABC is 10 square units.

Step-by-step explanation:

From point A (1,3) to point C (1,-2) is 5 units

To check this:

3 - (-2) = 3 + 2 =5

We're subtracting since the point went down (from positive 3 to negative 2)

Now for the area:

Area formula for a triangle: \frac{1}{2}bh = \frac{1}{2}⋅b⋅h

We already found the height (length) : 5

The base is from point C (1,-2) to point B (5,-2), which is 4 units

To check this:

5 - 1 = 4

Now that we have found the base and height, Let's solve:

\frac{1}{2}⋅4⋅5 = \frac{1}{2}⋅20 = 10

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Hope that helps :)

6 0
2 years ago
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SIZIF [17.4K]

Answer:

The variable "m" is the variable for SLOPE, and the variable "b" is the variable for the Y-INTERCEPT.

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7 0
2 years ago
How much pure water must be mixed with 10 liters of a 25% acid solution to reduce it to a 10% acid solution?
elena-s [515]

Suppose you add x liters of pure water to the 10 L of 25% acid solution. The new solution's volume is x + 10 L. Each L of pure water contributes no acid, while the starting solution contains 2.5 L of acid. So in the new solution, you end up with a concentration of (2.5 L)/(x + 10 L), and you want this concentration to be 10%. So we have

\dfrac{2.5}{x+10}=0.1\implies25=x+10\implies x=15

and so you would need to add 15 L of pure water to get the desired concentration of acid.

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Step-by-step explanation:

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3 years ago
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Step-by-step explanation:

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