(i) false;
Let be N = { 0, 1 , 2}; x * y = x + y => a * a = 2a ∈ { 0, 2 , 4}, which is not a( just for a = 0);
(ii) true;
b * c = c * b => a * ( b * c ) = a * ( c * b ); (1)
but, a * ( c * b ) = ( c * b ) * a; (2)
(1) and (2) => <span>a * (b * c) = (c * b) * a.</span>
Answer:
The other measure is 60º
Step-by-step explanation:
a triangle= 180º total
a right triangle has one 90º angle
there is a 30º angle given
180-90=90
90-30=60
so 60º
Answer:
2,3,4,5
Step-by-step explanation:
let four consecutive numbers are x,x+1,x+2,x+3
condition:
x+(x+1)+(x+2)+1=2(x+3)
3x+4=2x+6
3x-2x=6-4
x=2
Now first number 2
2nd number=x+1
2nd number=2+1=3
3rd number=x+2
3rd number=2+2=4
4th number=x+3
4th number=2+3=5
Answer:
Step-by-step explanation:
40
In standard form,it should be 0 +0.9 +0.05
