A school had 1,200 students last year and only 1,080 students this year. What was the percentage decrease in the number of students? Double number line, number of people, percent.

Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

What is the correlation coefficient between the variables? round to three decimal places. enter your answer in the box