Question

pls help all please I will follow u​

Answer 1

Answer:

1.a-19

2.b-36cm²

3.b-commutative

Answer 2

Answer:

1. fall in temperature = t₁(initial) - t₂ (final) = -12 - (-31) = 31-12 = 19° C (option a)

2. Area of shaded region = area of bigger rectangle - area of smaller rectangle = 7cm x 8cm - 4cm x 5cm = 56 cm² - 20 cm² = 36 cm² (option b )

3. The property shown is commutative property of addition (option b)