friendsalwaysbae
22.02.2021 •
Mathematics
Rachel brings cookies to her dance class one day. She gives 3/5 of them to her friends Karen, Tommy, and Gail. If she gave them 21 cookies, how many did she bring to dance class?
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Ответ:
14
Step-by-step explanation:
The total number of cookies was 35.
35 - 21 = 14
Ответ:
She brought 35 cookies to class
Ответ:
Shania is correct.
Step-by-step explanation:
For a right angled triangle, given two sides and an angle, we can use the sine rule or the various trigonometry identities to solve the triangle;
a/sin A = b/sinB
and
sin (angle) = opposite side/hypotenuse
cos (angle) = adjacent side/hypotenuse
tan (angle) = opposite/ adjacent
assuming a is the opposite side of angle A and b is also opposite of angle B
Otherwise, the only way to solve a triangle given two sides only is by the use of the Pythagoras theorem.
Hence, Shania is correct.