Question 26381
To solve this you use the Pythagorean theorem, which says;
{{{a^2}}}+{{{b^2}}}={{{c^2}}}
So we just plug into the equation the values given;
{{{7^2}}}+{{{b^2}}}={{{25^2}}}
49+{{{b^2}}}=625
subtract 49 from each side;
{{{b^2}}}=625-49
{{{b^2}}}=576
Now to get rid of the square you are going to find the sqroot;
{{{sqrt(b^2)}}}={{{sqrt(576)}}}
b=24
Hope you understand
=)