Simplify the following expressions:

A)3a+7+2(3+a)
B)8(2k+1+3k)
C)3+2(3p+5)+13p​

What is the rule for reflection across the y axis

Find the gradient of f(x,y,z)equals=left parenthesis x squared plus y squared plus z squared right parenthesis superscript negative 1 divided by 2 baseline plus ln left parenthesis x right parenthesis x2+y2+z2−1/2+ln(xyz) at the point left parenthesis negative 2 comma 1 comma negative 2 right parenthesis(−2,1,−2).

Which of the following is the result of expanding