Perpendicular liner intersect to form which kind of angle

a. acute
b. obtuse
c. right
d. reflex

Acollection of coins has value of 64 cents. there are two more nickels than dimes and three times as many pennies as dimes in this collection. how many of each kind of coin are in the collection?

20 solve 2(4 x + 3) < 5 x + 21. a) { x | x < 9} b) { x | x > -5} c) { x | x > -9} d) { x | x < 5}

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.