21g-6f-8g
13g-6f is the answer
combine like terms
D=2r
<span> diameter= 14cm
so, radius= 14/2= 7cm
</span>
Yes for the first one, yes for the second one, and yes for the third one although your subtraction equation had the wrong year (its not 1847 its 1846) but the answer was right, 65.
