Which equation could be used to solve problems involving the relationships between the angles?

A) (12 + a) + (7a + 12) = 90

B) 90 + (12 + a) = (7a + 12)

C) (12 + a) - (7a + 12) = 90

D) (7a + 12) - 90 = (12 + a)

Under the sugar act of 1764, for every pound of foreign white sugar purchased, accompanied a tax of 1 pound, 1 shilling, and 1 pence. Fior your purchase pn average 10 pounds of sugar per month, with eah pound costing you $1.00 before taxes.

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 A. 2/5 B. 32/5 C. 10 D. 20

How do you test this series for convergence or divergence? 4/7 - 4/8 + 4/9 - 4/10 + 4/11 - ... ... ?

A^2 - 10a + 16 = 0 solve

What is the axis of symmetry of h (x) = 5x2 + 40x + 64?

If you have 12 friends and make three equal teams, what fraction do you use?

A concession-stand manager buys bottles of water and soda to sell at a football game. The manager needs to buy a total of 4,500 drinks and have 25% more water than soda.

What is - 12x - 9+24x+4=43

An old nickel has doubled in value each decade. What is the value of the coin after 10 decades? a. exponential growth or exponential decay (choose one) b. answer:

Write the equation of a line perpendicular to y=1/2x + 8 that passes through (4, 9).