01222002
06.07.2019 •
Mathematics
Melanie sold half of her comic books and then bought 7 more. she now has 18. how many did she begin with?
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Ответ:
11x2=22
Melanie started with 22 comic books.
Ответ:
she began with 22 comic books
18-7=11
11+11=22
Ответ:
y=x
Step-by-step explanation:
if ( r , θ )
be the polar coordinate corresponding to the rectangular coordinate (x,y) of a point. then
x = r cos θ
and y = r sin θ ∴ y x = tan θ
here θ = ( π 4 ) So y x = tan ( π 4 ) = 1 ⇒ y = x