sum of two integers is -30 if one of them is 15 find the other integer pls urgent will mark u the brainliast

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¯¯¯¯¯¯¯¯)?

How can writing phrases as algebraic expressions you solve problems?

Find the amplitude of a sinusoidal function that models this temperature variation