PLEASE HELP ME ASAP Use the law of Cosines to solve for x. Fill in the blanks of the law of cosines below and then solve for x. Round your answer to the nearest whole degree.

What is 20+(5 x 2/5 )+ 3 show your work

Use the discriminant to describe the roots of each equation. then select the best description. 2m2 + 3 = m double root real and rational roots real and irrational roots non-real roots

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¯¯¯¯¯¯¯¯)?