hailey200127
11.12.2020 •
Mathematics
12. Solve for x.
15
X
12
Solved
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Ответ:
x=9
Step-by-step explanation:
a^2+b^2=c^2
12^2+b^2=15^2
144+b^2=225
b^2=225-144
b^2=81
b=9
b is x which mean x=9
Ответ:
Step-by-step explanation:
cos( - theta) = cos theta
cos( -90°)= cos90°= 0 option D