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Inessa05 [86]
2 years ago
14

7.15z + 2.3z = ?z i hate math

Mathematics
1 answer:
Nitella [24]2 years ago
3 0

Answer:

9.45z :)

Step-by-step explanation:

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What equation is equal to 6/7. I'm very confused.Can one of you guys please help me? Thank You
Burka [1]
0.85 is equal to 6/7 because you divide six by seven....Hope this helped. 

3 0
2 years ago
What property is this 19=2x-7 26=2x <br> Urgent there is no multiple choice
Nonamiya [84]

Answer: Addition Property of Equality

We add 7 to both sides to go from 19 = 2x-7 to 26 = 2x

4 0
3 years ago
Which of the following is a square root of 3(cos(4pi/9)+i sin(4pi/9))
Margaret [11]

Answer:

— 4√16(cos(4π3)+isin(4π3))=2(cos(−π6)+isin(−π6))=√3−i. Explanation: De Moivre's formula tells us that: (cosθ+isinθ)n=cosnθ+isinnθ.

Step-by-step explanation:

6 0
3 years ago
Factor completely:<br>64 - y^3
madam [21]
From your equation, you can see that you have a difference of two cubes (aka two cubes being subtracted): 64, which is 4^{3}, and y^{3}.

There is rule for the difference of two cubes:
The difference of two cubes is equal to the difference of the cube roots times a binomial, which is the sum of the squares of the roots plus the product of the roots.

That sounds pretty confusing, but it's much easier to understand when put mathematically. Let's say our two cubes are a^{3} and b^{3}. The difference of those two cubes is:
a^{3} - b^{3} = (a - b)( a^{2} + ab + b^{2})

In our problem, a = 4 (since a^{3} = 64) and b = y (since b^{3} = y^{3}. Plug these values into the rule to find the factor of 64 - y^3:
64 - y^3 \\&#10;= (4 - y)( 4^{2} + 4y + y^{2}) \\&#10;=  (4 - y)( 16 + 4y + y^{2})

-----

Answer: (4 - y)( 16 + 4y + y^{2})

8 0
2 years ago
Can someone help my cousin? hes in 5th grade and im not sure if im right with this question. :)
agasfer [191]

Answer: 2.25 = 18.90

Step-by-step explanation: Hope This Helps

7 0
3 years ago
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