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enot [183]
2 years ago
12

All the numbers round to 7 except 6.61 7.89 6.58 7.37

Mathematics
2 answers:
alisha [4.7K]2 years ago
6 0
7.89 rounds off to 8
lyudmila [28]2 years ago
4 0
7.89 because it’s closer to 8.00, not 7.00
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Brrunno [24]
0=0^2
1=1^3

Or are you looking for nontrivial pairs?
6 0
2 years ago
Solve 2csc^2x-2cscx-1=0 <br> for 0° ≤ x ≤ 360°
umka21 [38]

Answer:

Step-by-step explanation:

2 csc²x-2 csc x-1=0

or

\frac{2}{sin^2x} -\frac{2}{sin x} -1=0\\multiply~by~sin^2x\\2-2sin~x-sin^2x=0\\sin^2x+2sinx-2=0\\sin ~x=\frac{-2 \pm\sqrt{2^2-4*1*(-2)} }{2*1} \\=\frac{-2 \pm\sqrt{4+8} }{2} \\=\frac{-2 \pm\sqrt{4*3} }{2} \\=\frac{-2 \pm2\sqrt{3} }{2} \\=-1\pm\sqrt{3} \\|sin~x| \le ~1\\so~sin~x=-1+\sqrt{3} \\sin~x=\sqrt{3} -1\\x=sin^{-1}(\sqrt{3} -1) \approx 47.06^\circ,180-47.06\\or~x=47.06^\circ,132.94^\circ

6 0
2 years ago
Suppose you have $75 to spend on gas for your whole trip. You know that gas costs $3.40 per gallon. How many gallons of gas can
raketka [301]
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6 0
3 years ago
Read 2 more answers
Help PLEASE. I got number 3 but I can't figure out number 4.
Sergeeva-Olga [200]

Answer:

Verify the identity using trig rules.

tan  (  x  −  π /2  )  =  − cot  (  x  )  is an identity

Step-by-step explanation:

i think this is it, hope it helps

6 0
3 years ago
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Nataly [62]
That’s easy. He just has to score lower than the lowest athlete’s time. Since the lowest time is 9.75 seconds, any time lower than that will win him the competition.
6 0
3 years ago
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