13. a^2+7^2=15^2
a^2+49=225
-49=-49
a^2=176
a=13.266
14. 4 more girls chose soccer over softball.
15. I think it's a negative correlation or you have to find dots that can make a line
16. 3
Polar coordinates identifie the points of the plane by a distance from the reference point and an angle from a reference direction.
In this case the distance of (0,-2) from the origin is 2 and the anglefrom the x-axis is 180°. So the polar coordinates are (2, 180°)
Answer:
a. reflection
b. rotation, translation
Step-by-step explanation:
Answer: 4 pairs of socks
Step-by-step explanation:
According to the described situation, Anika spends 
in 1 pair of shin guards for 
and 
pairs of socks for 
each pair.
So, we can express this in the following equation:
Isolating we will find the pairs of socks:
Hence, Anika bought 4 pairs of socks.
