Write the expression −
3
x
2
+
2
y
2
+
5
x
y
−
2
y
+
5
x
2
−
3
y
2
in simplest form.

The weights of players in a basketball league are distributed normally. the distance (d) of each player's weight (w) from the mean of 86 kilograms was computed as follows: d = |w - 86| if d is greater than 7 for approximately 5% of the players, what is the approximate standard deviation of the players' weights? a. 1.75 kilograms b. 3.5 kilograms c. 4.3 kilograms d. 7 kilograms

Hi my sisters and brothers can tell me the answer because i don’t understand the question

If the scale factor between two circles is 2x/5y what is the ratio of their areas?