3 years ago

Solve the equation using square roots. 7x^2 + 6 =13

Mathematics

2 answers:

bonufazy [111]3 years ago

6 0

Answer:

x=1

Step-by-step explanation:

Take the root of both sides and solve

finlep [7]3 years ago

3 0

Answer: x=1, x=-1

Step-by-step explanation

7x^2+6-6=13-6

7x^2/7=7/7

x^2=1

x=square root(-1) square root(1)

<em>negative goes outside</em>

<em>the square root </em>

x=-1 x=1

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3 years ago

Find S5 for a geometric series for which a1=81 and r=1/9.

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ANSWER

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The sum of the first $n$ terms of a geometric sequence is given by;

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$S_5=\frac{81(1-(\frac{1}{9})^5)}{1-\frac{1}{9}}$

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3 years ago

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Tcecarenko [31]

Answer:

Step-by-step explanation:

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4 years ago

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Step-by-step explanation:

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