(A.B) = a + B, then (4.1) x (2.5) is equal to
=4+1+2+5=12
If 2 / 3 of a equals 3 / 4 of B, then a: B = (): ()
2 / 3 of a equals 3 / 4 of B
Then a = B × 3 / 4 × 3 / 2 = B × 9 / 8
So a: B = 9:8
If | a | is equal to 4, | B | is equal to 2, and | a + B | is equal to a + B, find the value of a-b
|A + B | is equal to a + B, indicating that a + b > = 0, then a must be 4, then a + B
2, then a: B=
a÷4 =b÷1.2
a :b=10:3