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klemol [59]
3 years ago
5

You buy 3 books that each cost the same amount and a magazine all for 55.99. You know that the magazine costs 1.99. How much doe

s each book cost
Mathematics
1 answer:
kenny6666 [7]3 years ago
7 0
Each of the three books costs $18
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I dont understand this
MrRa [10]

Answer: First option.

Step-by-step explanation:

You need to remember the following Trigonometric Identity:

cos\alpha =\frac{adjacent}{hypotenuse}

In this case, you can identify in the figure that:

\alpha =35\°\\adjacent=9\\hypotenuse=x

Then you must substitute these values into cos\alpha =\frac{adjacent}{hypotenuse}:

cos(35\°) =\frac{9}{x}

Finally, you need to solve for "x" in order to find its value. This is:

(x)(cos(35\°))=9\\\\x=\frac{9}{cos(35\°)}\\\\x=10.98

Rounding the result to the nearest tenth, you get:

x\approx11

8 0
3 years ago
Yeah I have zero idea what this is, can someone help me with it?
julsineya [31]

Answer:

You are correct (4,0)

Step-by-step explanation:

This is right because the two lines intersect at the point (4,0)

8 0
3 years ago
How many times does 291 go into 4?
Musya8 [376]

Answer: I think it's 72.75

Step-by-step explanation:

You divide 291 and 4 and it equals 72.75

<h3>I dont know if it's the actual answer but i hope this helps :)</h3>
7 0
3 years ago
Read 2 more answers
An author is having a book signing at a store. She agrees to give 15% of the money she earns to a local school library and 10% o
Fudgin [204]

Answer:

$300

Step-by-step explanation:

10+15=25% or 1/4

400/4=100

400-100=300

5 0
3 years ago
Find the perimeter of the given rectangle: 5x - 9 by 7
amid [387]

Answer:

x=12.6

Step-by-step explanation:

5x -9 / 7

5x= -9x7

5x= -63

x= -63/5 = -12.6

x= -12.6

5 0
2 years ago
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