Please answer

log(2x+5)+10=13

When solving a logarithm equation, how do you find the missing variable ?

Which values of m and b will create a system of equations with no solution? y=mx+b y=-2x+3/2

Mr. lash has 42 pounds of dog food to divide among his dogs. if each dog receives 7/8 pounds of food for each feeding, how many times can mr. lash feed his animals?