Mathematics

Julian

7 January, 16:15

1. Which expression is equivalent to a + (c+7)

1. 7ac

2. a - (c+7)

3. (c+7) - a

4. (a + c) + 7

2 Which expression is equivalent to x+11

1. 11x

2. 11+x

3. 11-x

4. - x+11

3. Which expression is equivalent to mn+z

1. nm+n

2. z+mz

3. mz+n

4, z+nm

4. Which expression is equivalent to (x y) z

1. (x + y) + z

2. 2z (xy)

3. x (yz)

4. x (y+z)