Which shows the correct substitution of the values a, b, and c from the equation -2 = -x + x2 – 4 into the quadratic formula?
Quadratic formula: x =
-b ty
b/b2 - 4ac
29
O x==(-1
-(-1)/(-1)2 - 4(1)(-4)
2(1)
O
x==1=V7-44-18-4
O
x =
- 11/(1)2 - 4(-1)(-2)
2(-1)
Ox=-(-1) IV(- 112 - 4(1)(– 2)
2(1)

first option

a function is a relation in which an input is paired with exactly one output.

so, let's find the right answer.

in our first option, our inputs are january, february, and march. the outputs are 30, 28, and 25. each input has it's own output. this is correct!

our second option we know is incorrect, because ms. valverade has two outputs, dogs and cats. this is not a function.

our third option is incorrect as well. the yellow square has two ouputs, the square and the triangle.

lastly, in our fourth option, we see the number 7 two times with a different output. therefore, this is not a function.

remember: each input must be paired with only one output!

solution:

as, mean is defined as sum of all the observations divided by total number of observations.

and , median is mid value of the data whether arranged in ascending order or descending order.

consider, roadsters:

2,3,4,5,6,7,8,9

mean =

also, median= , because number of observations is even, so median is mean of two mid values.

now, coming to bandits

2,3,4,5,6

mean =  

median = 4, as number of observations is odd.

so, roadsters has greater median as well mean than bandits.

→option a is true about the repairs performed on 2 types of cars:

bandits have lower median and mean than roadsters.

hiking down a winding trail.

step-by-step explanation:

hope this is what you were asking for!

step-by-step explanation: