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Vlad1618 [11]
3 years ago
12

2a - 5d = 30 dove for d

Mathematics
2 answers:
Slav-nsk [51]3 years ago
6 0
I hope this helps you




2a-30= 5d


d=2a-30/5


d=2a/5-6
AfilCa [17]3 years ago
5 0

2a - 5d = 30 solve for d

subtract 2a to both sides

2a - 5d - 2a = 30 - 2a

simplify

-5d = 30 - 2a

divide both sides by -5

-5d/-5 = (30 - 2a) / -5

simplify

d = -6 +0.4a

d = 0.4a - 6

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4 0
2 years ago
What is the simplest form of 4 square root 81x^8y^5?
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Firstly,
thanks for posting this.

81 = 9x9 or 9 squared so at this stage I'm guessing the last two. 
x^ 8 = (x^ 4) x (x^ 2) (its called the multiplication rule of indices). 
Okay I have approx 14 mins to answer.
No panic
√ 81.x^8 x <span>√ y^5
</span>√ (9x^2 x 9x^6) x <span>√ y^5
</span>= 9x x <span>√ 9x^6 x  </span><span>√ y^5
</span>did I just gain time?
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</span>or 2 . √ 3x^3. <span>√ y^5
</span>more time
okay, so that wasnt successful. 
√ 9x^6 =<span>√ </span> (3x^2) x <span>√ </span>(3x^4)




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3 years ago
I need help with #11 MULTIPLE CHOICE
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Answer:

d

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