What is the area of a rhombus whose sides are all 15 units and whose height is 6 units?

In the diagram, the measure of angle 9 is 85° which angle must also measure 85°?

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

At a local museum, the total price for one adult and one child is $11. mrs. smith paid for herself and her three children. she spent $19. record the system of equations to be solved and then find the price of an adult and child ticket using either elimination or substitution.