Annette wanted to buy new carpet for her L-shaped room. Which expressions could be used to calculate the area of her room? Choose exactly two answers that are correct.
a. (17 • 20) – (7 • 14)
b. ( 17• 6 ) + ( 14 • 10 )
c. ( 17 • 20 ) – ( 14 • 10 )
d. ( 17 • 6 ) + ( 20 • 10 )

1

Jawapan

2016-01-06T03:11:08+08:00
A) (17·20) - (7·14)
= 340 - 98
= 242

b) (17·6) + (14·10)
= 102 + 140
= 242

c) (17·20) - (14·10)
= 340 - 140
= 200

d) (17·6) + (20·10)
= 102 + 200
= 302

thus, the answer is option (a) and (b)