Expressions
Write the expression for 10 more than x
x + 10
Collect the like terms:
2a + 3a + 8b
5a + 8b
Use the Distributive Law to expand the following:
2(a+8)
= (2xa) + (2x8)
= 2a + 16
Evaluate x+10 if x = 5
= 5+10
= 15
x + 6 = 20
x + 6 - 6 = 20 - 6
x = 14
Write the expression for 6 less than b
b-6
Collect the like terms:
5a - 3a + 7b - 2b
2a + 5b
Use the Distributive Law to expand the following:
3(a-3)
= (3xa) - (3x3)
= 3a - 9
Evaluate 14 - y if y = 6
= 14 - 6
= 8
x - 9 = 10
x - 9 + 9 = 10 + 9
x = 19
Write the expression for 7 lots of y
7y
Collect the like terms:
2a - 6a + 9b
-4a + 9b
Use the Distributive Law to expand the following:
5(y-11)
= (5xy)-(5x11)
= 5y - 55
Evaluate 3a if a = 7
= 3 x 7
= 21
2x = 50
2x/2 = 50/2
x = 25
Write the expression for k divided by 6
k/6
Collect the like terms:
4xy + 4x + 4xy + 4y
8xy + 4x + 4y
Use the Distributive Law to expand the following:
3a(b + 4)
= (3a x b) + (3a x 4)
3ab + 12a
Evaluate y/5 if y=20
= 20/5
= 4
2x + 3 = 13
2x + 3 - 3 = 13 - 3
2x = 10
2x/2 = 10/2
x = 5
Write the expression for 8 lots of a plus 9
8a + 9
Collect the like terms:
3xy - 10xy + 10xy + 2xy
5xy
Use the Distributive Law to expand the following:
2a(a + b)
=(2a x a) + (2a x b)
= 2a2 + 2ab
Evaluate 6x + 7 if x = 10
= 6x10 + 7
= 60 + 7
= 67
y/7 = 4
y/7 x = 4 x 7
y = 28