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anonymous
 one year ago
Solve 4r2 – 9 = 91.
A.
{± 3}
B.
{± 4}
C.
{± 5}
D.
{±6}
anonymous
 one year ago
Solve 4r2 – 9 = 91. A. {± 3} B. {± 4} C. {± 5} D. {±6}

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0add +9 for both sides 4r^29 +9=91+9

anonymous
 one year ago
Best ResponseYou've already chosen the best response.04r^2=100 r^2=25 r=+5

KendrickLamar2014
 one year ago
Best ResponseYou've already chosen the best response.11. A 9 to both sides:\[4r^2−9+9=91+9 = 4r^2=100\]

KendrickLamar2014
 one year ago
Best ResponseYou've already chosen the best response.12. Divide both sides by 4:\[\frac{ 4r^2 }{ 4 } = \frac{ 100 }{ 4 }\]

KendrickLamar2014
 one year ago
Best ResponseYou've already chosen the best response.1Yes, C is Correct :)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0you r left with r2 and 25 @KendrickLamar2014

KendrickLamar2014
 one year ago
Best ResponseYou've already chosen the best response.1Yes, then u take the square root of 25

KendrickLamar2014
 one year ago
Best ResponseYou've already chosen the best response.1Which equals: r = 5 or r = 5

KendrickLamar2014
 one year ago
Best ResponseYou've already chosen the best response.1C is o r r e c t

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Solve (z + 6)2 = 5. A. B. C. D.

KendrickLamar2014
 one year ago
Best ResponseYou've already chosen the best response.1One question per post
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