Which expression represents the phrase "twice the difference of a number and 5"?
2 (1+5)
-5+ 2.1
2+2 (1-5)
2 (1 – 5)

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).

Find the slope of the line below . enter your answer as a fraction or decimal. use a slash mark ( / ) as the fraction bar if necessary

Segment xy is dilated through point m with a scale factor of 2. which segment shows the correct result of the dilation