Find
a + b, 6a + 8b, |a|, and |a − b|

Lilianna uses 3/4 calories per minute just by sitting. she uses 1 more calorie per minute by walking. lilianna uses a total of 12 1/4 calories walking to the park. lilianna uses the equation, d(.75+1)=12.25 to represent the situation. what does the variable d represent in the equation?

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68

Which is f(5) for the function –2x2 + 2x - 3?