Look at the change in population in europe from 1300 to 1400 during the black death epidemic use a calculator to determine the percentage that the population decline between those two centuries to get the answer you need to subtract the population between the two centuries then divide this difference in the population with the population in the year 1300 finally multiplied by 100 to get the decline in percentage

75 tickets have been sold so far.

step-by-step explanation:

in this question it is clearly mentioned that 45 children's tickets have been sold and this number is 60% of the total tickets sold.

now let's assume the total number of tickets sold be x.

then 60% of x = 45

⇒

⇒ x(.6) = 45

by dividing with .6 on both the sides of the equation

⇒ x = 75

therefore 75 tickets have been sold so far.

$12. that is my answer.

graph b

step-by-step explanation:

one solution- graph a (clear intercepting point.)

no solution- graph b (they're parallel, there will never be a point of interception.)

infinite solutions- graph c (all points intercept.)