Evaluate the following expression, when x=-2

2x^2+4x-3

A) 3
B) 3
C) -19
D) 9​

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?

Worth 30 points! in this diagram, both polygons are regular. what is the value, in degrees, of the sum of the measures of angles abc and abd?

If y varies as x, and y=8 as x=4 what will be the value of y if x=2