Use quadratic formula to solve these equation (a).3x²+6x+2=0​

Step-by-step explanation:

3x² + 6x + 2 = 0

Quadratic Formula is:

x = -b ± √b²- 4ac/2a

So...

Δ = b² - 4ac = 6² - 4.3.2 = 12

x = -6 ± √Δ/2.3 = -6 ± √12/6

x' = -6 + √12/6 ≈ -0,4227

x'' = -6 - √12/6 ≈ -1,5774

S = { -0,4227 , -1,5774 }

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0

the correct answer is you spend $55.78 more in a brand store that buy ing in a normal store.

step-by-step explanation:

brand = spend   $ 135.85 total

store = spend $80.07 total