6) Evaluate the given expressions:
a) 2x + 3y for x = 2, y = 3
b) 3p + 7q + 4 for p = 1, q = 2
c) 6s + 7t for s = 9, t = 7
7) Evaluate the following polynomials:
a) 2x
2
+ 3x + 3y
3
+ 2 for x = 1, y = 2
b) 4m
4
+ 7n
4
for m = 2, n = 4
8) Evaluate the following:
a)
for x = 3
b)
for u = 2
9) Simplify the following algebraic expressions:
a) (12y)
2
+ 2 for y = 3
b) (4z)
2
+ (7k)
3
for z = 2, k = 4
10) Evaluate the following expressions:
a) 2xy + 3x
2
y + 5xy
3
for x = 3, y = 2
b) p
2
q + 3pq + p
2
q
2
for p = 2, q = 3
11) Find the value of the following expressions:
a) 0.2x + 0.3xy + 0.5y for x = 1, y = 3
b) 2x + 3xy + 4y
2
for x = 0.2, y = 0.7
12) Simplify the expression:
a) pqr(3pq + p + 5q) + 4rq for p = 2, q = 3, r = 4
b) 9a(4ac + 7c + bc) + ab
2
c for a = 3, b = 4, c = 7
