Simplify the expression: 4(5x − 3) + 2

a 20x - 14
b 20x -10
c 20x - 5
d 20x - 1

Thales was an ancient philosopher familiar with similar triangles. one story about him says that he found the height of a pyramid by measuring its shadow and his own shadow at the same time. if the person is 5-ft tall, what is the height of the pyramid in the drawing?

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

Solve x+3y=6 and 4x-6y=6 by elimination . show work !