Question

part 2
for each rectangle, write one multiplication expression for the area of the gray
part, and one multiplication expression for the area of the white part. then
combine them to make an equation that shows the total area.
area of gray rectangle:
no
area of white rectangle:
total area of rectangle:

Explanation:

Step1: Analyze gray area

Count gray columns (4) and rows (7). Area: $4\times7$

Step2: Analyze white area

Count white columns (3) and rows (7). Area: $3\times7$

Step3: Total area equation

Sum gray and white areas: $4\times7 + 3\times7=(4 + 3)\times7 = 7\times7$ (or $49$)

Answer:

Area of gray rectangle: $4\times7$
Area of white rectangle: $3\times7$
Total area of rectangle: $4\times7 + 3\times7 = 7\times7$ (or $49$)