(_+_-_+_)-(_+_-_+_)=0

What is x and y (use substitution? ) 5x+3y=38 and y=3x+8?

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?

Terri makes a quilt using three sizes of fabric squares the side lenght of each fabric square is the square root of the area