X²+10x+21=0
/\ = 10²-4*1*21
/\ = 100 - 84
/\ = 16
x = (-10+/-\/16)/2
x = (-10+/-4)/2
x' = (-10+4)/2 = -6/2 = -3
x" = (-10-4)/2 = -14/2 = -7
S: {-3; -7}
Answer :after four years the price of car depreciate
Answer:
9 divided by 63, 6 divided by 78 and 3 divided by 56
Step-by-step explanation:
For something to be a function, each input (x value) can only have ONE output (y value)
If an input has multiple outputs, it is not a function.
so the last graph represents a function (parabola going down)
Answer:
40
60
Step-by-step explanation:
20÷2=10
10×4=40
10×6=60
