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ryzh [129]
3 years ago
13

What the distance between (2,1) and (-5,8)

Mathematics
2 answers:
viva [34]3 years ago
7 0
Exact form = 7 √2
Decimal form= 9.899
Brut [27]3 years ago
4 0

Answer:

\sqrt{98} or 9.89949

Step-by-step explanation:

use the distance formula

d=\sqrt{(x_{2}-x_{1} )^{2} +(y_{2}-y_{1})^{2}    }

d=\sqrt{(-5-2)^{2}+(8-1)^{2}  }

d=\sqrt{(-7)^{2} +(7)^{2} } \\\\\sqrt{49+49}

d=\sqrt{98} or 9.89949

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3 0
3 years ago
Given the value of cos 20° ≈ 0.9397, enter the sine of a complementary angle. Use an expression relating trigonometric ratios of
NARA [144]

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Note: if the computer doesn't like the answer of "sin 70" then try "sin(70)" and see how that works out. It's also possible that the teacher wants the single numeric value of "70" in the first box rather than the "sine" part to go along with it. Though that would be strange and incorrect since cos(20) = 70 is a false statement.

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