Don't know how to finish.

simplify the expression and solve the equation. show all calculations.
\[ \sqrt{28}+\sqrt{63}+\sqrt{175} \]

i think i have
\[2\sqrt{7}+5\]
but can't seem to finish.

What expression is equivalent to log3(x+4)

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible

There are 10 chicks on ginger's farm .she has 2 chicks in one outdoor pen and 5 chicks in another. the rest of the chicks are in the barn. what is the fraction of total chicks in outdoor pens?