Which shows the correct substitution of the values a, b, and c from the equation 2 *+ ? - 4 into the quadratic formula?
Quadratic formula: x
-0.40
2 a
Ox-(-1):V-1)-4(1)(-4)
2(1)
-11V1?-4-1)(-4)
2(-1)
- 1 + a)? -46-12-2)
21-1)
x --(-1)/(-1). - 4(1)( - 2)
2(1)

In two or more complete sentences, determine the appropriate model for the given data and explain how you made your decision. (1,-1), (2,0.5), (5,1.5), (8,2)

Write the component forms of vectors u and v, shown in the graph, and find v − 2u. u= (< -3, -2> , < -3, -1> , < -2, -2> , < -2, -1> ) v= (< -5, 1> , -4, 0> , < 0, -4> , < 1, -5> ) v-2u= (< 5, 3> , < 0, 4> , < 4, 0> , < 5, -3>

Abby is collecting rainfall data. she finds that one value of the data set is a high-value outlier. which statement must be true? abby will use a different formula for calculating the standard deviation. the outlier will increase the standard deviation of the data set. the spread of the graph of the data will not change. abby will not use the mean when calculating the standard deviation.