The value of the expressions are
1. = 2
2. = 8
3 = 3 ⅓
4 = -1/2
5 = 1 ⅕
In mathematics, expressions are combinations of numbers, variables, and operators (like +, -, *, /). They represent mathematical relationships and can be as simple as 3x or complex like (2a + 5) / (3b - 1).
Solving the numerator;
-7 + 2² -5
= -7 + 4 -5
= -8
Solving the denominator;
-5+3-2 = -4
therefore, (-7+2²-5)/-5+3-2 = -8/-4
= 2.
2. -8+ ( -8+4)²
= -8 +(-4)²
= -8 +16
= 8
3. -3/4 ÷ -9/16 + 3
= 3/4 × 16/9 + 3
= 4/3 + 3
= 10/3 = 3 ⅓
4. -6 +4)/-1 +5
= -2/4 = -1/2
5. 8- ( 5+(-12)/18
= 8 -(-7)/8
= 15/18 = 5/6 = 1 ⅕