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Mandarinka [93]
2 years ago
9

Which operations are commutative and associative

Mathematics
1 answer:
MAVERICK [17]2 years ago
3 0

Answer:

addition and multiplication

Step-by-step explanation:

The only operations that can use the commutative and associative properties are addition and multiplication.

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Help me please i’m dying and i’m just dying help
photoshop1234 [79]

Answer:

70

Step-by-step explanation:

verticle angles are congruent (the same) so if 1 is 110 than 4 is 110. also same side interior angles are supplementary (equal to 180) meaning 6 is 70. If verticle angles are congreunt then 7 also equals 70

3 0
3 years ago
A radio station requires DJs to play 2 commercials for every 10 songs they play.What is the unit rate of songs to commercial?
Wittaler [7]
The DJs unit rate is 5 songs for every 1 commercial.

I found this by dividing both the commercials and the songs by their greatest common factor, or 2.
7 0
3 years ago
Read 2 more answers
I don’t know the answer
shutvik [7]

Answer:

HJ is 8

JE is 4

Step-by-step explanation:

Nice song in the other tab by the way:)

7 0
3 years ago
Solve for x
Ulleksa [173]

Answer:

C. x = 1

Step-by-step explanation:

To solve this problem the best way is to use the quadratic formula. First make everything equal to 0 by adding 3 to both sides.

3x^2 - 6x + 3 = 0

The quadratic formula is: \frac{-b\pm\sqrt{b^2-4ac} }{2a}. Substitute the values of a, b, and c into the formula. Keep in mind:

  • a = 3
  • b = -6
  • c = 3

\frac{-(-6)\pm\sqrt{(-6)^2-4(3)(3)} }{2(3)} \rightarrow \frac{6\pm\sqrt{36-4(9)} }{6} \rightarrow \frac{6\pm\sqrt{0} }{6} \rightarrow \frac{1\pm0}{1} \rightarrow 1

Therefore, x = 1.

8 0
3 years ago
Simplify the expression by using a double-angle formula. 2 cos^2 4 theta -1
avanturin [10]
You are given 2cos² (4θ - 1). You are asked to s<span>implify the expression by using a double-angle formula. 

Apply the double angle of the cosine function
</span>cos2θ = 2cos² θ - 1

Rearranging the expression and then substituting them
2cos² θ = cos2θ + 1
2cos² (4θ - 1) = cos 2(4θ - 1) + 1
cos2(4θ - 1) + 1

3 0
3 years ago
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