Can Someone explain Equations to me?

The equation for the pH of a substance is pH = - log[H+], where H + is the concentration of hydrogen ions. Which equation models the concentration of hydrogen ions (H+) of a solution whose pH is 7.2?

What is the conversion factor that you can use to convert gallons to pints?

Write and solve an addition equation to find x. Perimeter = 48 ft An addition equation for this problem is = 48. The solution is x = feet.

Determine whether quadrilateral ABCD with vertices A (-4,-5), B (-3,0), C (0, 2), and D (5, 1) is a trapezoid.

Log2cos (x) How do I find the derivative of the following question

Suppose tom has 23 coins totaling $4.25. if he has only dimes and quarters, how many of each type does he have?

Express ax - a + x - 1 as a product of two binomials.

0.09 is 10 times as much as

Your gym membership costs $30 to join and $25 per month. Which equation gives the total cost, y, for a membership that lasts x months?

The graph of the function f (30x) can be obtained from the graph of y=f (x) by one of the following actions: a) horizontally stretch the graph of f (x) by a factor of 30 b) Horizontally compress the graph of f (x) by a factor of 30 c) vertically