f = (f1 f2) / (f1 + f2)
f(f1 + f2) = f1 f2
f f 1 + f f 2 = f1 f 2
f1 f2 - f f2 = f f1
f2 (f1 - f) = f f1
f2 = (f f1) / (f1 - f) <==== solution
Answer:
130
Step-by-step explanation:
10 x 13 = 130
13 + 13 + 13 + 13 + 13 + 13 + 13 + 13 + 13 + 13 = 130
Answer:
61.6
Step-by-step explanation:
tan(72) = x/20
x = 61.6 rounded to the nearest tenth
Answer:
To find the x-intercepts we can write:
0 = -1/2(x + 3)² + 4
0 = -1/2(x² + 6x + 9) + 4
0 = -1/2x² - 3x - 9/2 + 4
0 = -1/2x² - 3x - 1/2
0 = x² + 6x + 1
x = -3 ± 2√2 (use quadratic formula)
As a decimal this can be written as x = -5.83, x = -0.17.
Answer:
C) y = 60x
Step-by-step explanation: