Question

A. Tell whether each statement is True or False.

_________1. If a = 7, b = 3 and c = -5, then the value of 3a + 4b + 2c = 23 _________2. If x = -2, then the value of 3x + 5 = -1
_________3. If r = -5, then the value of 3 − 10 = 95
_________4. If p = 4 and v = - 3, then 3+5 2+10 = 17 4
_________5. If m = -3 and n = 4 2−5 3 = 4 12 1 3​

Answer 1

Answer:

1. True

2. True

Explanation :

1. If ;

a = 7 ; b = 3 and c = -5

3a + 4b + 2c = ?

Substitute given values :

3 ( 7 ) + 4 ( 3 ) + 2 ( -5 )

21 + 12 - 10

33 - 10

23

3a + 4b + 2c = 23

2. If x = -2 ;

3x + 5 = ?

Substitute x value in Equation ;

3 ( -2 ) + 5

- 6 + 5

- 1

3x + 5 = -1