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stira [4]
3 years ago
7

You sign up for 13 weeks of swimming lessons. the total cost is $325. what is the cost per week?

Mathematics
2 answers:
maw [93]3 years ago
6 0

To find the cost per week, divide the total cost by how many weeks you are signing up for.

Total cost / number of weeks = cost per week

$325 / 13 weeks = $25 per week

The cost per week is $25 for swimming lessons.

Artist 52 [7]3 years ago
3 0
The answer to your problem is: 25
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HELP Use either law of sines or law of cosine. Need help on this problem! show work please!​
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Answer: x = 15.035677095729 approximately

Round this however you need to.

=================================================

Explanation:

I'm assuming you want to find the value of x, which your diagram is showing to be the length of segment QR.

If so, then we'll need to find the measure of angle Q first. Using the law of sines, we get the following:

sin(Q)/q = sin(R)/r

sin(Q)/PR = sin(R)/PQ

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Q = arcsin(0.6816068987) ... or ... Q = 180-arcsin(0.6816068987)

Q = 42.9693397461 ... or ... Q = 137.0306602539

These values are approximate.

----------------

Now if Q = 42.9693397461 approximately, then angle P is

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Similarly, if Q = 137.0306602539 approximately, then,

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A negative angle is not possible, so we'll ignore Q = 137.0306602539

----------------

The only possible value of angle P is approximately P = 52.0306602539

Let's apply the law of sines again to find side p, aka segment QR

sin(P)/p = sin(R)/r

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sin(52.0306602539)/x = sin(85)/19

19*sin(52.0306602539) = x*sin(85)

19*sin(52.0306602539)/sin(85) = x

x = 15.035677095729

This value is approximate.

Round this value however you need to.

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