3 years ago

What does tan 21= 9/x

1 answer:

8 0

In this case X would equal 23.4458.

-I hope this is the answer you are looking for, feel free to post your questions here on brainly in the future.

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5.023 I believe

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3 years ago

Factor then solve.<br>1.81 - 4x²=0<br>2. 4s² + 9 = 12s

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$1.\\81-4x^2=0\\\\9^2-(2x)^2=0\\\\(9-2x)(9+2x)=0\iff9-2x=0\ \vee\ 9+2x=0\\\\-2x=-9\ \vee\ 2x=-9\\\\x=4.5\ \vee\ x=-4.5$

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$2.\\4s^2+9=12s\\\\4s^2-12s+9=0\\\\(2s)^2-2\cdot2s\cdot3+3^2=0\\\\(2s-3)^2=0\\\\(2s-3)(2s-3)=0\iff2s-3=0\\\\2s=3\\\\s=1.5$

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3 years ago

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Help me please.. i don't wanna fail

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3 years ago

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