Question 153658
To determine proportionality, cross multiply.
If the products are equal, the fractions are proportional.
{{{7/9 = 21/27}}}
{{{7(27)=9(21)}}}
{{{189=189}}}
Yes, they are proportional.
{{{(7/9)(3/3)=21/27}}}
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{{{12/(3*(-8))=12/(-24)=-(1/2)}}}
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Remember the order of operations: parentheses, powers, then addition.
{{{(3^2+1^2)+2=(9+1)+2}}}
{{{(3^2+1^2)+2=(10)+2}}}
{{{(3^2+1^2)+2=12}}}