2. If the specific heat of water is 4.18 J/kg.°C, how much heat is required to increase the temperature of 1.2 g of water from 23 °C to 39 °C?*
80 J
44 J
11 J
17J

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 graph of y = ax^2 + bx + c is a parabola that opens up and has a vertex at (0, 5). what is the solution set of the related equation 0 = ax%2 + bx + c?

How do you solving the solution of each system using elimination?