Jon and lexi are playing a marble game. according to their rules, 4 point are awarded for each red marble collected and 3 point are awarded for each blue marble collected. which expression represents jon's total score if he has r red marbles and b blue marbles?

1.) 4r - 3b
2.) 2r - 3b
3.) 4r + 3b
4.) 7rb

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).

Me! last question, and i'm stuck! write the algebraic expression that models the word phrase. the product of 2 divided by the number h and 8 more than the number k

Ineed with this problem 21 show steps