Answer:
c I think
Step-by-step explanation:
I'm pretty sure but you should probobly wait for another answer
Answer:
k = -1
Step-by-step explanation:
You're given (x+4) as one of the factor for the equation
x² + kx - 20 = 0
what number does 4 multiply with to get -20? It's -5.
So
= (x+4)(x-5)
= x² + -1x - 20
= x² + kx - 20
Answer:
Mean is 70.2
Median is 72
Mode is 85
Step-by-step explanation:
The mean is the average
The medians the middle
The mode shows up the most
Answer:
Total cost is $100.41 ( $93.84 + $6.57)
Step-by-step explanation:
Thinking Point: The total cost is the cost of the items PLUS the tax. 93.84 ∙ 0.07 = 6.5688 (round to “cents”) = $6.57
Hope this helped!
![x^4 - (x^2-1)(x^2+1)](https://tex.z-dn.net/?f=x%5E4%20-%20%28x%5E2-1%29%28x%5E2%2B1%29)
Use the formula: (a+b)(a-b) = a^2 - b^2
![x^4 - [(x^2)^2 - 1^2]\\\\x^4 - (x^4-1)\\\\x^4 - x^4 + 1\\\\\boxed{\bf{1}}](https://tex.z-dn.net/?f=x%5E4%20-%20%5B%28x%5E2%29%5E2%20-%201%5E2%5D%5C%5C%5C%5Cx%5E4%20-%20%28x%5E4-1%29%5C%5C%5C%5Cx%5E4%20-%20x%5E4%20%2B%201%5C%5C%5C%5C%5Cboxed%7B%5Cbf%7B1%7D%7D)
No matter what the value of 'x' is, the final answer will always be
1.