Suppose that r varies directly with s and inversely with t, and r=2 when s=3 and t=12. What is the value of r when s=5 and t=4?

I already know the answer but I'd like to know how to find it.

Auto insurance options offered by AA Auto Insurance are outlined in the table below. What monthly payment would you expect for an insurance policy through AA Auto Insurance with the following options?

The diameter of the circle above is 20 cm. What is the circumference of the circle? (Use = 3.14.) A. 628 cm B. 314 cm C. 62.8 cm D. 31.4 cm

Adding 3/8 to a number increases it by 5% of its original value. What is the original number?

Mr. Smith spends a certain amount of money at the mall. His friend Shantia spends $20.00 less than him. Write an expression that represents how much money Shantia spent

Mackenzie wants to buy a backpack that costs $50. if the tax rate is 6.5% how much tax will she pay?

Charlize and camille solved the equation 4x-2y=8 for y

The average woman's height is 65 inches with a standard deviation of 3.5 inches. a.) Determine the z-score of a woman who is 70 inches tall. Round to the nearest tenth. b.

Slope-intercept equation of (0,8) (1,9)

Given f (x) = 2x^2 and g (x) = 4x+1, find (fog) (x)

The corresponding angles in △ABC are congruent to the corresponding angles in △FGH. The measures of two corresponding sides of the triangles are given. AB = 4 AC = 6 FG = x+11 FH = 7x What is the length of FH?