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3 years ago

Lebo buys blank writable CDs in bulk. He repackages them and sells them

Mathematics

1 answer:

Kay [80]3 years ago

5 0

Answer:

He must sell each CD for R1,10 to make 40% profit

Step-by-step explanation:

R40×5%=2

R40-2=R38

40%×38=R15,2

15,2+40=55,2

55,2÷50=R1,10

i didnt do the radio sum...

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brilliants [131]

Answer:

Step-by-step explanation:

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3 years ago

Sombody is taking a 1680 mile road trip. At the end of the first day they had completed 3/8of there trip. How many miles did the

patriot [66]

Answer:

Step-by-step explanation:

1680 mile road trip....they completed 3/8 of it...

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3 years ago

Jen wants to buy a dress that originally had the price of $33, but now it is on sale 10% off. How much will Jen pay for the dr

valentinak56 [21]

Answer:

$29.70

Step-by-step explanation:

1. First, we have to find how much 10% of 33 is!

$\frac{10}{100} * 33$
$\frac{330}{100}$
$3.3$

2. Okay, now that we know 3.3 is 10% of 33, we need to subtract 3.3 from 33 to get the amount Jen will pay for the dress.

$33 - 3.3$
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Therefore, Jen will pay $29.70 for the dress.

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3 years ago

Can someone explain how you would figure this out step by step.

Xelga [282]

Answer:

Step-by-step explanation:

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2 years ago

Integration: How would I get to this answer?

Scrat [10]

Given that $y$ attains a maximum at $x=1$ , it follows that $y'=0$ at that same point. So integrating once gives

$\displaystyle\int\frac{\mathrm d^2y}{\mathrm dx^2}\,\mathrm dx=\int-8x\,\mathrm dx$
$\dfrac{\mathrm dy}{\mathrm dx}=-4x^2+C_1$
$\implies -4(1)^2+C_1=0\implies C_1=4$

and so the first derivative is $y'=-4x^2+4$ .

Integrating again, you get

$\displaystyle\int\frac{\mathrm dy}{\mathrm dx}\,\mathrm dx=\int(-4x^2+4)\,\mathrm dx$
$y=-\dfrac43x^3+4x+C_2$

You know that this curve passes through the point (2, -1), which means when $x=2$ , you have $y=-1$ :

$-1=-\dfrac43(2)^3+4(2)+C_2$
$\implies C_2=\dfrac53$

and so

$y=-\dfrac43x^3+4x+\dfrac53$

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3 years ago