Question

1. substitute these values into each expression; a = 5, b = 2

a. a + b
b. a - b
c. 2a + 3b
d. 5a - b

Explanation:

Step1: Substitute a=5, b=2

$a + b = 5 + 2$

Step2: Calculate sum

$5 + 2 = 7$

Step1: Substitute a=5, b=2

$a - b = 5 - 2$

Step2: Calculate difference

$5 - 2 = 3$

Step1: Substitute a=5, b=2

$2a + 3b = 2(5) + 3(2)$

Step2: Compute multiplications

$2(5) + 3(2) = 10 + 6$

Step3: Calculate sum

$10 + 6 = 16$

Step1: Substitute a=5, b=2

$5a - b = 5(5) - 2$

Step2: Compute multiplication

$5(5) - 2 = 25 - 2$

Step3: Calculate difference

$25 - 2 = 23$

Answer:

a. 7
b. 3
c. 16
d. 23