Question

This is what I need help with pls

Answer 1

`\sf -6.55`

Explanation:

In order to solve this, we use BODMAS rule:

BODMAS is an acronym that stands for Brackets, Order, Division, Multiplication, Addition, and Subtraction. It is a mnemonic device used to remember the order of operations in mathematics.

The order of operations is a set of rules that tells us which operations to perform first in a mathematical expression. The rules are as follows:

• Brackets: Evaluate the expressions inside brackets first.
• Order: Evaluate any exponents or roots next.
• Division and Multiplication: Perform division and multiplication from left to right.
• Addition and Subtraction: Perform addition and subtraction from left to right.

In this case:

`\sf -19 + \left( (-4.5 + 6.87)/(3)\right)\cdot 5^2 - 7.3`

Simplify number which is inside the parentheses:

`\sf -19 + \left( (2.37)/(3)\right)\cdot 5^2 - 7.3`

`\sf -19 +0.79\cdot 5^2 - 7.3`

Now solve the square:

`\sf -19 +0.79\cdot 25 - 7.3`

`\sf -19 + 19.75 -7.3`

`\sf 0.75 -7.3`

`\sf -6.55`