Question

No:1,3,5 ada yang bisa??
please..bantu.

Answer 1

1. 7 1/5 +( 5/2 x 9/4) = 7 1/5 + 45/8) = 7 1/5 + 5 5/8
   = (7 + 5) + (1/5 + 5/8)
   = 12 + (8/40 + 25/40)
  = 12 33/40 (C)

3. 8 = 2³
Jadi

3. dikalikan dengan (3 - √7) / (3 - √7)
= 6(3 - √7) / (3² - √7²)
= 6 (3 - √7) / (9 - 7)
= 6 (3 - √7) / 2
= 3 (3 - √7)
= 9 - 3√7 (D)