How many solutions does the system of equations have?

3x + 12y = 20
y = -1/4x + 5/3

a. one
b. two
c. infinitely many
d. none

In the proof of the triangle angle sum theorem, you must draw an auxiliary line. which construction must you use to draw this line?

50 points! antonio made a scale model of a building. the model's scale is 1 inch to 235 feet and its height is 3.5 inches. what is the exact height of the actual building? enter your answer in the box.

Lee has $1.75 in dimes and nickels. the number of nickels is 11 more than the number of dimes. how many of each coin does he have?