Denis bought 50 postage stamps for which she paid $13.00. Some were 20-cent stamps and some were-40 cent stamps. How many of each did she buy? (Please show work with Substitution or Elimination Method)

The slope of a line is -1/2 . what is the slope of a line that is parallel to it? a. 1/2 b.2 c. -1/2 d. -2

Brent needs to paint a logo made using two right triangles. the dimensions of the logo are shown below. what is the difference between the area of the large triangle and the area of the small triangle? (1 point) select one: a. 4.5 cm2 b. 8.5 cm2 c. 16.5 cm2 d. 33.0 cm2

It says factor each expression 49x-28?