Find the solutions to the equation below
Check all that apply.
2x2 +9x + 4 = 0

Step-by-step explanation:

Use quadratic formula:

x=((-b+-sqrt(b^2-4ac))/2a

x=((-9+-sqrt(9^2-4(2)(4))/2(2)

x=((-9+-sqrt(81-32))/4

x=((-9+-sqrt(49))/4

x=(-9+-7)/4

Solution 1:

x=-2/4

x=-1/2

Solution 2:

x=-16/4

x=-4

Now we check:

2(-1/2)^2+9(-1/2)+4=2/4+-9/2+4=1/2+-9/2+4=-8/2+4=-4+4=0 (x=-1/2 works)

2(-4)^2+9(-4)+4=2(16)+(-36)+4=32-36+4=-4+4=0 (x=-4 works)

So the solutions of the equation are x=-1/2 and x=-4

x = -2

y = 848

step-by-step explanation:

plug in the numbers

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

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step-by-step explanation: