12. During a recent random survey of 100 Texans, 25 of them said they had visited the city of San Antonio in the past year. What is the ratio of the number of those who had visited San Antonio to the number who had not visited San Antonio in the last year? 25:100
100:25
1:3
1:4​

25:75 = 1:3 in simplest form

Step-by-step explanation:

you are comparing the # of ppl who said thay visited to the # of people who did not go. 100-25=75. then you simplify.

19.

step-by-step explanation:

you add the 9 in the tens column since it is a single digit and 9 plus zero is 9 so it is 19

to plot points   for x just start at the origin (middle) and go to the left however many times it say(if the number is a positive) if the number is a negative then go right however many times it says if it is 0 go nowhere

now keep you pencil there and go up however many times it says on y(if it is positive) if it is negative then go down however many times it says. if it says 0 go nowhere.

you have just plotted a point! now when you finish plotting all of them connect them with a ruler

plot each point as (-3, 7), (0,4), (3,1), (8,-4)   in the parenthesis on the left of the comma is x and the right is y.