4(3x + 5y + 2z) + 3(x-z)tom: 12x + 20y +8z jess: 5(3x + 4y +2) chistian: 15x + 20y - 5z  which one is equivilant?    

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¯¯¯¯¯¯¯¯)?

If sin(x) = 0 and cos(x) = 1, what is tan(x)?

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers