What expression represents the profit, and what is the profit if 240 cell phones are sold?

Mathematics

1 answer:

mariarad [96]3 years ago

4 0

70x + 50; $28,800 that’s your answer

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The volleyball team at West View High School is comparing T-shirt companies where they can purchase their practice shirts. The t

mina [271]

10.5x = 7.5x + 30
10.5x - 7.5x = 30
3x = 30
x = 30/3
x = 10

10.5(10) = 105
7.5(10) + 30 = 75 + 30 = 105

they need to purchase 10 t-shirts from each company for a total of $105 for each company

5 0

4 years ago

Read 2 more answers

What was left of A dollars after 45% of it was spent? (Show your work.)

anastassius [24]

Answer:

0.55A dollars

Step-by-step explanation:

If 45% of the money was spent, then the percentage left was

100% - 45%, or 55%.

Thus, to answer this question, we multiply (A dollars) by 0.55:

0.55A dollars was left after the expenditure of 45% of the original amount.

6 0

3 years ago

Test yourself 2

mafiozo [28]

Ok, so dy/dx=0 at the point (0,3) that is where x=0 and y=3.

$\int { 6x+6dx } \\ \\ =\frac { 6{ x }^{ 2 } }{ 2 } +6x+C\\ \\ =3{ x }^{ 2 }+6x+C$

$\\ \\ \therefore \quad { f }^{ ' }\left( x \right) =3{ x }^{ 2 }+6x+C$

Now, f'(x)=0 when x=0.

Therefore:

$0=C\\ \\ \therefore \quad { f }^{ ' }\left( x \right) =3{ x }^{ 2 }+6x$

Now:

$\int { 3{ x }^{ 2 } } +6xdx\\ \\ =\frac { 3{ x }^{ 3 } }{ 3 } +\frac { 6x^{ 2 } }{ 2 } +C$

$={ x }^{ 3 }+3{ x }^{ 2 }+C\\ \\ \therefore \quad f\left( x \right) ={ x }^{ 3 }+3{ x }^{ 2 }+C$

But when x=0, y=3, therefore:

$3=C\\ \\ \therefore \quad f\left( x \right) ={ x }^{ 3 }+3{ x }^{ 2 }+3$

7 0

3 years ago

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What set of numbers best describes the height of an airplane as it descends to an airport runway ?

MariettaO [177]

All positive numbers. I think

5 0

3 years ago

Rectangle 1 and Rectangle 2 are similar. Rectangle 2 is three times as long as Rectangle 1. If Rectangle 2 is 18 inches wide, ho

olchik [2.2K]

Answer: 6 inches

Step-by-step explanation:

If rectangle 2 is 3 times as long as rectangle 1, then all we hae to do is divide the width by 3 (The width is 18)

18 ÷ 3 = 6

5 0

4 years ago