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bulgar [2K]
3 years ago
15

Jessica has four more hockey cards than one third the number of cards that David owns if Jessica has 12 hockey cards how many do

es David have
Mathematics
2 answers:
8090 [49]3 years ago
8 0
We can use the equation <em>j=1/3(d)+4, </em>where j represents Jessica's cards and d represents David's cards. We already have the number of cards that Jssica has, so we can just solve the equation.

12=1/3(d)+4
simplified is
8=1/3(d)
which is d=24

So David has 24 cards.

:)
erica [24]3 years ago
7 0
I believe the answer would be 24


work:

12-4=8   8x3=24
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Can I have help solving for x?:))
zvonat [6]

Answer:

24.8

Step-by-step explanation:

We will have to use trigonometry here to find the value of x. The first thing we can see is that we need to work out the hypotenuse. We need to chose whether to use Sin, Cos or Tan. We do that by look at the sides .

→ 'x' is the hypotenuse

→ 12 is opposite

→ The adjacent is the side that doesn't have a numerical value to we look for a formula triangle without adjacent in it

Tan = Opposite ÷ Adjacent

Sin = Opposite ÷ Hypotenuse

Cos = Adjacent ÷ Hypotenuse

We can see the Sin formula has no adjacent in it so we use that formula. However we want to work out the hypotenuse so we have to rearrange the sin formula to get hypotenuse as the subject so

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→ Let's substitute in the values

Hypotenuse = 12 ÷ Sin(29)

Hypotenuse = 24.7519841

So the value of x is 24.8 to 1 decimal place

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Step-by-step explanation:

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