Which is the solution of the equation below, rounded to the nearest tenth?

1.6x – 3.38 = 5.81x + 4.67

a.–0.2
b. –0.3
c. –1.9
d. –2.0

If a and b are the measures of two first quadrant angles and sin a = 4/9 and sin b = 2/5 find sin(a+b).

Proceed as in example 3 in section 6.1 to rewrite the given expression using a single power series whose general term involves xk. ∞ n(n − 1)cnxn − 2 n = 2 − 4 ∞ ncnxn n = 1 + ∞ cnxn n = 0

Acircle has a circumference of 7.850 units. what is its radius?