Omar scored an 82% on his first test. He scored 38 out of 50 on the second test. Which performance is better? Explain your reasoning.

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¯¯¯¯¯¯¯¯)?

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.

Solve the equation. 2x - 8(x+1)= 6(2x - 3)