Which equation is an identity? A. (9x/15) + 27 = (9x/15) + (27/15) B. 3((x/2) + 16) - 16 = (3/2)x C. -4(3 - 2x) = -12 - 8x D. -5((x/15) - 16) - 30 = 50 - (1/3)x E. 36((3/4)x- 2) + 72 =-72 + 27x

Credit card a offers an introductory apr of 3.4% for the first three months and standard apr of 15.7% thereafter,

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle

Apossible wavelength for the color blue is 0.000000492 meter. which of the following is a reasonable estimate for this wavelength for the color blue? a. 5 × 10-6 m b. 5 × 107 m c. 5 × 10-7 m d. 5 × 106 m