Hello :
the discriminat of each quadratic equation : ax²+bx+c=0 ....(a <span>≠ 0) is :
</span><span>Δ = b² -4ac
1 ) </span>Δ > 0 the equation has two reals solutions : x = (-b±√Δ)/2a
2 ) Δ = 0 : one solution : x = -b/2a
3 ) Δ <span>< 0 : no reals solutions
in this exercice : -3x²-2x+6 =0.....a = -3 b = -2 c =6
calculate : </span>Δ............................
Answer:
0.29
Step-by-step explanation:
z-score is given by the formula:
z=(μ-M)/σ where
- μ is the hypothesis drive distance, which is 222
- M is the mean sample drive distance
- σ is the standard deviation of the sample drive distance
Therefore
z=(222-218)/14≈0.29
Answer:
Value of middle 7 =
(value of 7 to the left of the middle 7)
Value of middle 7 =
(value of 7 to the right of the middle 7)
Step-by-step explanation:
7 in the middle of number
is equal to 
7 to the left of the middle 7 is equal to 
So,

That is value of middle 7 =
(value of 7 to the left of the middle 7)
Also,
7 to the right of the middle 7 is equal to 
So,

That is value of middle 7 =
(value of 7 to the right of the middle 7)