a new bridge requires triangles that are in a ratio of 1:1, if AC=4x-3 and EC=2x+6. find the distance between the top and bottom of the bridge

50 ! pls ! 12.  building codes regulate the steepness of stairs. homes must have steps that are at least 13 inches wide for each 8 inches that they rise.

a. discuss how to find the slope of the stairs.
b. describe how changing the width or height affects the steepness of the stairs.

What is the number 321,000,000 in scientific notation? also what is the number? ?

Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.