Evaluate the given expression

1. Evaluate the given expression for
x = 3 and y = 5.
1). x + y
2). 2xy
3). 5x/3y
= 3 + 5 = 8
= 2(3)(5) = 2(15) = 30
= 5(3)/3(5) = 15/15 = 1

2. Evaluate the given expression for x = 3 and
y = 5.
3x + 2y
Answer :
Substitute 3 for x and 5 for y into the given expression.
3x + 2y = 3(3) + 2(5)
= 9 + 10
= 19
3x + 2y = 3(3) + 2(5)

3. Evaluate the given expression for m = 5
and n = 2.
m + 2n
Answer :
Substitute 5 for m and 2 for n into the given expression.
m + 2n = 5 + 2(2)
= 5 + 4 = 9
Substitute 5 for m and 2 for n into the given expression.

4. Evaluate the given expression for
m = 1/3.
18m + 7
Answer :
Substitute 1/3 for m into the given expression.
18m + 7 = 18(1/3) + 7
= (18/3) + 7
= 6 + 7
= 13