Solve the system of linear equations by graphing y=-x-4 y=x were do the lines intercept

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.

Can someone factor this fully? my friend and i have two different answers and i would like to know if either of them is right. you in advance. a^2 - b^2 + 25 + 10a

Handsome jack is buying a pony made of diamonds. the price of the pony is p dollars, and jack also has to pay a 25% diamond pony tax. which of the following expressions could represent how much jack pays in total for the pony?