Helllppp!
y = -1/2x^2 + 2
y = -2x^2 + 3
y = -3/4x^2
y = -4/5x^2 - 5
for the quadratic equations shown here, which statement is true?
a) the graphs open upward.
b) the graphs open downward.
c) the graphs are symmetric about the x-axis.
d) the graphs are listed from narrowest to widest.

The number of hours per week that the television is turned on is determined for each family in a sample. the mean of the data is 37 hours and the median is 33.2 hours. twenty-four of the families in the sample turned on the television for 22 hours or less for the week. the 13th percentile of the data is 22 hours. approximately how many families are in the sample? round your answer to the nearest integer.

Find the roots of the equation below. x^2 - 6 + 9 = 0

In his stamp album ,jamal has 48 new stamps and 72 used stamps. which ratio can be represented by 3/5