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OpenStudy (anonymous):
Evaluate the following expression. √21-5+9 a. 11 b.144 c.13 d.7
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OpenStudy (anonymous):
The answer is supposed to be 13, but I don't understand how they got that. Can anyone help?
OpenStudy (lyrae):
Is that \[\sqrt{21-5} + 9\]? Otherwise it becomes qute difficult to solve...
OpenStudy (anonymous):
Yeah, I thought the answer was 5. But that's not an option. So I did it another way and got 7. It's quite confusing but thanks for trying.
OpenStudy (lyrae):
Sure np :)
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