Answer:

Step-by-step explanation:
Height of the Rectangle
Width of the Rectangle
Area of the Rectangle = Height X Width

The area of the rectangle is 
Answer:
Perimeter- 26cm
Area- I Don't know sorry. I'll comment if I figure it out
Answer:
41
Step-by-step explanation:
x=12
so y=3⋅12 +5
=36+5
=41
Answer:
5x² - 31x + 30
Step-by-step explanation:
(5 - x)(6 - 5x)
= 30 - 25x - 6x + 5x²
= 30 - 31x + 5x²
= 5x² - 31x + 30