lilrider777
27.02.2020 •
Mathematics
70% of the 40 members of the club voted. how many voted ?
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Ответ:
28 people voted
Step-by-step explanation:
70% = 0.70
0.70 x 40 = 28
Ответ:
21
Step-by-step explanation:
Since this is a right triangle, we can use the Pythagorean theorem
a^2 +b^2 = c^2
where a and b are the legs and c is the hypotenuse (opposite the right angle)
20^2 +b^2 = 29^2
400 + b^2 =841
Subtract 400 from each side
400-400 +b^2 = 841-400
b^2 = 441
Take the square root of each side
sqrt(b^2) = sqrt(441)
b = 21