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Lerok [7]
3 years ago
12

Find the angle θ between the vectors. u = cos π 4 i + sin π 4 j v = cos π 2 i + sin π 2 j

Mathematics
1 answer:
Nadusha1986 [10]3 years ago
5 0
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Bill and Mary Ann went to the Viola bakery. Bill bought 5 pies and 7 donuts for ​$12.65. Mary Ann bought 6 of each for ​$12.30.
sweet [91]

Answer:

Pies=$0.85

Donuts= $1.20

Step-by-step explanation:

In the equation let p stand for the number of pies and d stand for the number of donuts.

To solve this set up 2 equations, one representing bill and the other representing Mary Ann.

  • Bill's equation is 5p+7d=$12.65.
  • Mary Ann's equation is 6p+6d=$12.30

Then solve using a system of equations. Systems of equations can be solved using elimination or substitution. I will use substitution. Solve bill's equation for p. This gives you p=\frac{12.65-7d}{5}. Then, you can substitute that into Mary Ann's equation. This looks like 6\cdot \frac{12.65-7d}{5}+6d=12.3. Solve for d. Once you solve d=1.20. Finally, substitute 1.20 back into either Bill's or Mary Ann's for d and solve for p. No matter which equation you use p=0.85.

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3 years ago
Who's excited for Christmas?!?! :D<br> if not why?
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8 0
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Brainliest answer to whoever is right,<br> (6b - 4)(b - 8) = 0.<br> Solve for b
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There are two answers.

b1 = 2/3

b2 = 8

6 0
3 years ago
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A negative number raised to an odd power is ___ negative
Lorico [155]

Answer:

true.

Explanation:

still negative.

If a negative number is raised to an even power, the result will be positive. If a negative number is raised to an odd power, the result will be negative

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4 years ago
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