What is an algebraic expression? A. the operation between two number or letters

B. letters that represent numbers

C. a branch of mathematics

D. a combination of operations on letters and numbers

d. a combination of operations on letters and numbers

Step-by-step explanation:

b is a variable and c can be all sort of things

the answer is 13

step-by-step explanation:

5*5=25

12*12=144

25+144=169

169^2=13

answer would be 8.64 or s = 11π/4 inches

step-by-step explanation:

s = r θ  

where s = arc length  

r = radius = 3 inches  

θ = central angle in radians = ( π /180)*165  

s = 3(π/180)*165  

= 8.64 inches