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3 years ago

Step by step 3(4d+1)-9d=6(2-d)

Mathematics

2 answers:

ss7ja [257]3 years ago

8 0

Just use Math----- way

anastassius [24]3 years ago

8 0

1. Expand
12d+3-9d=12-6d

2. Collect Like Terms
3d + 3 =12-6d
9d=9

3. Solve
(9d/9) = (9/9)
d=1

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Find the discriminant and determine the nature of the roots to the quadratic equation

Katen [24]

№17
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№18
$2 x^{2} -3x+4=3 \\ 2 x^{2} -3x+4-3=0 \\ 2 x^{2} -3x+1=0 \\ \\ D= -3 ^{2} -4*2=9-8=1 \\ \\ x_{1} = \frac{3+1}{2*2} = \frac{4}{4} =1 \\ \\ x_{2} = \frac{3-1}{2*2} = \frac{2}{4} =0.5$
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№19
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Answer:

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Step-by-step explanation:

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part d: this is already solved but can be shown in multiple forms.

Inequality Form: n < 56

Interval Notation: ( -∞ , 56)

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