What is the correct classification of 72 + 9 + 4?

Mathematics

1 answer:

Mkey [24]3 years ago

6 0

85 i hope this helps you.

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Cos (x + π/ 3) + cos (x - π/ 3) = 1 Solve for "x" on the interval [0, 2pi)

kenny6666 [7]

$\bf cos\left( x+\frac{\pi }{3} \right)+cos\left( x-\frac{\pi }{3} \right)=1\\\\
-----------------------------\\\\\
[cos(x)cos\left( \frac{\pi }{3} \right)\underline{-sin(x)sin\left( \frac{\pi }{3} \right)}] 
+ [cos(x)cos\left( \frac{\pi }{3} \right)\underline{+sin(x)sin\left( \frac{\pi }{3} \right)}]=1
\\\\\\$

$\bf cos(x)cos\left( \frac{\pi }{3} \right)+cos(x)cos\left( \frac{\pi }{3} \right)=1\implies 2cos(x)cos\left( \frac{\pi }{3} \right)=1
\\\\\\
2cos(x)\cdot \cfrac{1}{2}=1\implies cos(x)=1\implies \measuredangle x=cos^{-1}(1)
\\\\\\
\measuredangle x = 
\begin{cases}
0\\
2\pi 
\end{cases}$

8 0

4 years ago

Parallelogram ABCD has vertices: A(-3, 1), B(3, 3), C(4, 0), and D(-2, -2). In two or more complete sentences, explain how you c

mina [271]

You have to shoe that the angles between adjacent sides = 90 degrees. You do do this by showing the adjacent sides are perpendicular by comparing their slopes.

4 0

3 years ago

Read 2 more answers

Save

nikklg [1K]

Answer:

9 years i think

Step-by-step explanation:

3 0

4 years ago

Write an expression to represent multiplying the sum of 8 and 2 by 6.

eimsori [14]

Answer:

6 (8 + 2)

The sum means addition. Add 8 and 2. Multiply that entire thing by 6.

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3 years ago

Mr. Drucker uses a periodic review system to manage the inventory in his dry goods store. He likes to maintain 15 sacks of sugar

Bas_tet [7]

Answer:

6 sacks

Step-by-step explanation:

Mr. Drucker tries to always hold 15 sacks on his shelf to keep his inventory in stock. He currently has 9 sacks. Since 15 - 9 = 6, he needs to order 6 sacks.

This problem has many extraneous values which are good information about Mr. Drucker's buisness but do not pertain to how much he needs to order to maintain 15 sacks on his shelf.

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3 years ago