Answer:
Parentheses can change the result of the answer. If you want to add 4 and 0.95 first, then multiply that number by 3, then you need parentheses.
Step-by-step explanation:
When you are given the question 3 X 4 + 0.95, it has to types of operations. <u>People solve using the order PEDMAS</u>:
Parentheses,
Exponents,
Division and Multiplication,
Addition and Subtraction.
Since there are <u>no parentheses</u> or exponents, the solver will do multiplication first, then addition.
3 X 4 + 0.95 Multiply first
= 12 + 0.95 Now add
= 12.95 Answer without parentheses
If you add <u>parentheses around 4 + 0.95</u>, the answer would change. According to PEDMAS, the parentheses must be solved before anything else.
3 X (4 + 0.95) Add inside parentheses
= 3 X (4.95) Now multiply
= 14.85 Answer with parentheses
If you added <u>parentheses around 3 X 4</u>, the answer would not change, because you still multiply first.
(3 X 4) + 0.95 Solving parentheses first
= 12 + 0.95 Add
= 12.95 Answer same as original
![-20 \leq 3x+1 \leq 10\\ \Rightarrow\ -21 \leq 3x \leq 9\\ \Rightarrow\ -7 \leq x \leq 3\\ Sol=[-7\ 3]\ if\ x\ is\ a\ real. ](https://tex.z-dn.net/?f=-20%20%5Cleq%203x%2B1%20%5Cleq%2010%5C%5C%0A%5CRightarrow%5C%20-21%20%5Cleq%203x%20%5Cleq%209%5C%5C%0A%5CRightarrow%5C%20-7%20%5Cleq%20x%20%5Cleq%203%5C%5C%0A%0ASol%3D%5B-7%5C%203%5D%5C%20if%5C%20x%5C%20is%5C%20a%5C%20real.%0A)
