Which of these is a mathematical expression? A
B
4 - 3r

C
4 - 3r = 1

D
“Happily ever after”
PLEASE HELP ITS ON A QUIZ AND ITS DUE IN TEN MINUETS

Evaluate the function , when d = {9, 15, 30}. r = {5, 7, 12} r = {6, 10, 15} r = {6, 10, 20} r = {5, 12, 20}

Which figures are polygons? select each correct answer. figure a figure b figure c figure d

The equation m = 19.32v can be used to find the mass m in grams of a pure gold coin with volume v in cubic centimeters. carl has a coin with a mass of 37.8 grams. the coun's volume is 2.1 cubic centimeters. could the coin be pure gold? explain your reasoning. whoever answers this correctly gets marked brainliest! this is also worth a decent amount of points than normal questions!