Answer:
81(x + 2y)(x - 2y)
Step-by-step explanation:

CD = XY = 26 mm
hope that helps
Answer:
The increment in the model is 106cm
Step-by-step explanation:
Given


Required
Determine the increment
To do this, we simply subtract the initial height of the building from the final height



<em>Hence, the increment in the model is 106cm</em>
in STR,
ST=SR
therefore, t=r(angles opposite equal sides of a triangle are equal)
T=73
C+73+73=180(ASP of triangle)
C=34
Answer:
D
Step-by-step explanation:
15 + 2x + x + 3 = 3x + 18
hope this helps