We have a + b = 180 and a = 12 + b;
Then, 12 + b + b = 180;
12 + 2b = 180;
2b = 168;
b = 84;
a = 12 + 84;
a = 96;
3. The answer is 18 because 12➗4= 3 so 6*3=18
For the<span> geometric sequence, it has two forms of formula
</span>
<span>We are interested in the recursive formula now
</span>
<span>
{-80, 20, -5, ...}
The common ratio is (20/-80)=(-5/20)=-1/4=-0.25
So our r</span><span>ecursive formula would be

</span>
I hope that
helps!
500 is one tenth as much as 50 is correct.
500 of 1/10=50
<span>500 is 10 times as much as 50 is wrong.
</span>500 x 10= 5,000 not 50
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