Use the Quadratic Formula to find the exact solutions of x2 + 7x - 4 = 0.
x= b + b2- 4ac squared over 2a
x=-7+33 squared over 2
x=-7+65 squared over 2
x=7 +65 squared over 2
x= 7+ 33 squared over 2

1 1/4 hours

step-by-step explanation:

2/4 + 2/4 + 1/4 = 5/4 or 1 1/4

∠acb = 8°

step-by-step explanation:

∠xba lies on the circle and is half the measure of the intercepted arc ax

hence

measure of arc ax = 2 × 42° = 84°

∠acb is outside the circle and is

∠acb = (arcab - arcax ), hence

∠acb = 0.5 (100 - 84) = 0.5 × 16° = 8°

one of each metals

step-by-step explanation: