Answer: Every polygon that is not a triabgle (3 vertices), quadrilateral (4 vertices) or pentagon (5 vertices) has more than 5 vertices. So it would be a hexagon, heptagon, etc.
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:
1. χ² = 18.548
2. χ² = 23.685
Step-by-step explanation:
1. Confidence level is 99% (α = 0.01), but we're only interested in the left half, so α/2 = 0.005. Degrees of freedom are 7−1 = 6. Looking up in a chi square table, χ² = 18.548.
2. Confidence level is 90% (α = 0.10), but we're only interested in the right half, so α/2 = 0.05. Degrees of freedom are 15−1 = 14. Looking up in a chi square table, χ² = 23.685.
X=1
Explanation:
Conduct a ratio, -2/12=x/-6
You have to find the x in this ratio so you will multiply -2 and -6 together, and multiply 12 and x together and make them equal to eachother. It would look like this.
(-6)(-2)=12x
12=12x
x=1
I hope this is right and I’m sorry if I’m wrong:((
