To present clearly, these are the following expressions:
Expression 1: <span>5+2×(3+3)×(3−1)
Expression 2: 5+2×3+3×3−1
The numbers and operations are just the same, but the first expression involves parentheses. In mathematics, when you are presented with multiple operations in one equation, you follow the PEMDAS rule. This rule assigns which operation should be the first priority. The P means parenthesis. So, any expression inside the parenthesis should be calculated first. This is followed by Exponent(E), Multiplication (M), Division (D), Addition (A) and lastly, Subtraction (S).
</span>Expression 1: 5+2×(3+3)×(3−1)
Do the operations inside the two parentheses first:
5 + 2 × 6 × 2
Then, the next priority is multiplication:
5 + 24 = 29
Expression 2: 5+2×3+3×3−1
Prioritize multiplication:
5 + 6 + 9 -1
Prioritize the addition next.
20 - 1 = 19
The difference of the 2 expressions is: 29 - 19 = 10.
Answer:
7x³y² - 3x²y² + xy - 5
Step-by-step explanation:
Add like terms.
5x³y² + 2x³y² = 7x³y²
-3x²y² = -3x²y²
-3xy + 4xy = xy
2 - 7 = -5
Put them all together.
7x³y² - 3x²y² + xy - 5
Answer:
4y + 2y = 12
solved; y = 2
Step-by-step explanation:
put the 2 y values together to get 6y. Then divide both sides by 6 to icolate y to get 2.
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6 is your answer so it's like this x=3 y=6 or x=6 y=3
Answer: A
Step-by-step explanation:
The y intercept is positive 1, so it’s not C or D
The slope is positive because it’s going up from left to right so it’s not B
