Mark is solving the equation 4x^2 = 12x - 9 using the quadratic formula.

1 answer:

7 0

First, modify the equation such that it is in the format of ax^2+bx+c=0, and you do this by performing inverse operations to 12x and -9 on one side of the equation such that they are moved to the other side of the equation. The numbers that are in the places of a, b and c in the quadratic are the values that may be used for a, b and c in the quadratic formula.

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quester [9]

Answer:

8 cm

Step-by-step explanation:

Set inequality as per question:

2000 ≤ V ≤ 2500

We know that:

V = πr²h
h = 10 cm
π = 3.14

Substitute and solve for r:

2000 ≤ 3.14*10r² ≤ 2500
2000 / 31.4 ≤ r² ≤ 2500 / 31.4
63.69 ≤ r² ≤ 79.62
64 ≤ r² < 81
r² = 64 ⇒ r = 8 cm is the possible radius

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Step-by-step explanation:

Parallel m=2

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Nuetrik [128]

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Step-by-step explanation:

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