Solve using the crossing-graphs method: 12 x + 3 x = 9 x + 3. Round your answer to two decimal places. a) 0.68 b) 0.98 c) 1.28 d) 0.

1. Solve using the crossing-graphs method: 12x + 3x = 9x + 3. Round your answer to two decimal places.

a) 0.68

b) 0.98                       

c) 1.28

d) 0.33

2. Find the positive solution using the crossing-graphs method: 4x3 − 7x = 4 − 2x2. Round your answer to two decimal places.

a) 1.55

b) 2.35

c) 1.95

d) 1.35 

3. A breeding group of foxes is introduced into a protected area, and the population growth follows a logistic pattern. After t years the population of foxes is given by

                            N =  foxes.

When will the fox population reach 78 individuals? Round your answer to two decimal places.

a) a