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Kobotan [32]
2 years ago
6

Sam wants to buy a CD player that costs $241. He has $25 that his uncle sent him for his birthday. He just started

Mathematics
1 answer:
Debora [2.8K]2 years ago
7 0

Answer:

It will take Sam 18 weeks to save $241.

Step-by-step explanation:

The CD cost $241 then minus that by $25 and you get $216 than divide that by $12 because he gets that amount of money per week and then you get $18.

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Christy went on a round-trip bicycle ride starting at her house. When she left, she traveled downhill at a rate of 24 kilometers
vazorg [7]
Since this is a round-trip, Christy covered the same distance in both journey.

Let the distance covered be
d

When she left the house, she travelled at
24 \: kph

We were given the average speed to be
20 \: kph

Meaning if we add the speed in the return journey to 24 kph and find the average , we must obtain 20 kph.

Let
x
be the speed in the return trip.

Then
\frac{24 + x}{2} = 20

We solve for x to obtain;

24 + x = 40

x = 40 - 24 = 16 \: kph

We were also told that she took half an hour longer in the return trip.

If we let
t
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Now we have the following:

First Journey

speed = \frac{d}{t}

24 = \frac{d}{t}

\Rightarrow d = 24t - - - (1)

Second Journey

16 = \frac{d}{t + 0.5}

\Rightarrow d = 16(t + 0.5) - - - (2)

Now let us equate the two equations to obtain,

16(t + 0.5)= 24t

We expand and simplify to obtain;

16t + 8= 24t

This implies that,

8= 24t - 16t

.
8= 8t

t = 1

Hence the return trip took,

t + 0.5 = 1 + 0.5 = 1.5

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3 years ago
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inysia [295]

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3 years ago
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Answer:

Step-by-step explanation:

All the possible measurements of a triangle would include the following

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Step-by-step explanation:

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