What is the value of a, if 5a-b-c=36 and b=c=1/2a

Brainlest answer can you find the area and circumference of a circle given the radius or diameter? if its yes or no explain why

Find the exact value of each of the following. in each case, show your work and explain the steps you take to find the value. (a) sin 17π/6 (b) tan 13π/4 (c) sec 11π/3

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days