Use matrix operations and substitution to determine which of the following numerical values for z can be substituted into the second equation to solve for y?

Fractions can be added and subtracted only if they're fractions. a. like b. proper c. improper d. unlike

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¯¯¯¯¯¯¯¯)?

Find the maximum value of p= 4x + 5y subject to the following constraints :