Solve each system by elimination

-2x-4y=10
2x+4y=-10

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m

The equation represents the function f, and the graph represents the function g. f(x)=3(5/2)^x determine the relationship between the growth factors of f and g. a. the growth factor of g is twice the growth factor of f. b. the growth factor of f is twice the growth factor of g. c. the growth factor of f is 2.5 times the growth factor of g. d. the growth factor of f is the same as the growth factor of g.

The length of a rectangle plus its width is 24 cm. the area is 143 square cm. what are the length and width of the rectangle?