14 . D
Angles x and y are supplementary, so if x + y = 180 and x = 2 y, then x = 120
and y = 60. Because all radii are equal, you can tell that the triangle with
angles b and y is equilateral, so b = 60, and the triangle with angles a and
x is isosceles with a vertex angle of 120°, so a = 30. The ratio of a to b,
then, is 1:2.15 . D
If the cost of 2 pretzels is $2.20, then each pretzel costs $1.10, and 3
pretzels cost $3.30. Two sodas, then, cost $4.60 – $3.30 = $1.30.
16 . A
Notice that if you distribute just the you’ll get an equation in terms ofx + 1:17 . E
The more “uphill” the line (as you move from left to right), the greater
the slope. Lines and DO will all be “downhill” lines—that is, they
all have negative slopes. Lines and will be uphill—they have
positive slopes—but is visibly “steeper” than