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dalvyx [7]
3 years ago
15

Can someone please help me?​

Mathematics
1 answer:
salantis [7]3 years ago
4 0

Answer:

12

Step-by-step explanation:

24*68*15

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Find sin(u/2) if tan(u)=-7.721 and u is in quadrant 4
morpeh [17]

Answer:

.6601

Step-by-step explanation:

to find u, which we assume is an angle of course, we can take arctan of both sides.  so arctan(-7.721) = -1.4420.  this angle is in quadrant 4, but it is not in the range.  In this instance you just go around the circle again, or add 2pi, which gets us 4.8412.  You can check and you get the same answer if you take the tangent of either.

So now we have a number in the appropriate range  in the appropriate quadrant.  That means we have the correct angle.  The question asks what is sine of that angle cut in half.  so sin(4.8412/2), which gets you your answer.  let em know if something didn't make sense.  

7 0
3 years ago
50 - 16 ÷ 2 × (12 + 4)
Margaret [11]

Hey there!

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= 50 - 8 × 12 + 4

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~Amphitrite1040:)

4 0
3 years ago
Read 2 more answers
A manager at the bookstore must arrange a collection of 231 books for display. The manager decides to use a combination of 15 sh
Kitty [74]

Answer:

6 tables.

Step-by-step explanation:

If he has 15 shelves, we can put the overall number of books off to the side for a moment. First calculate how many books he COULD put onto shelves. This would be 7*15, since each of fifteen shelves can hold 7 books. Counting by fifteens or using a calculator allows us to see that the shelves can hold 105 books.

Going back to the original number of books, we subtract 105 from the original value. The equation at this point is 231 - 105. The result is 126 books left to put on top of tables. But we're not done yet!

Since a table can hold 25 books, we need to divide the remaining number of books by 25. That would be 126/25. Doing this gives us 5 tables we would need, plus one book let over. Since we've run out of shelves, we MUST use another table just for the final book. That's 5+1, or 6 tables. Let's not forget to label our answer.

6 0
3 years ago
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noname [10]
Hope this helps you!

3 0
3 years ago
mary can buy 12 oranges at store A for $3.84 and 15 oranges for $5.00 at store B.Which store has the better unit cost?
Likurg_2 [28]
Store a is 3.125 per orange 
store B is 3 Per orange 
So store B has the better unit cost
you get the unit costs by dividing the amount by the prices.
8 0
3 years ago
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