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3 years ago

What is the discriminant of the quadratic equation

Mathematics

1 answer:

kkurt [141]3 years ago

7 0

The discriminant is b^2 -4ac
a = 1
b = -2
c = 4

discriminant = 4 -4 * 1 * 4 =
4 -16 =
-12
I get MINUS 12 as the answer but that isn't one of the choices.

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PLEASE HELP WILL GIVE BRAINLIEST ANSWER!!

andreyandreev [35.5K]

Speed = Distance / Time

Distance = 5t^4 - 10t^2+6

Time = t+2

Now:

5t^4 - 10t^2 + 6 | t+2
-5t^4 -10t^3 5t^3 - 10t^2 + 10t - 20
\\\\\ -10t^3-10t^2+6
+10t^3+20t^2
\\\\\\\ 10t^2+6
-10t^2-20t
\\\\\ -20t+6
+20t+40
\\\\\ 46

<span>C. 5t^3-10t^2+10t-20+(46)/(t+2))</span>

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3 years ago

A real estate sales agent receives a salary of $250 per week plus a commission of 2% of sales.Write an equation that gives the w

lisabon 2012 [21]

The equation y=0.02x+250 gives the weekly income y in terms of sales x.

Step-by-step explanation:

Given,

Weekly salary of real estate agent = $250

Commission rate = 2%

Let,

x be the sales per week.

y be the total weekly income.

Amount of commission = 2% of sales per week

Amount of commission = $\frac{2}{100}*x$

Amount of commission = 0.02x

Total weekly income = Amount of commission + Weekly salary

$y=0.02x+250$

The equation y=0.02x+250 gives the weekly income y in terms of sales x.

Keywords: equation, percentage

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4 years ago

John is going for a walk. He walks for 6.4 miles at a speed of 2 miles per hour. For how many hours does he walk?

KonstantinChe [14]

Answer:

t = d/s

t = 6.4 / 2 miles

t = 3.2 miles

Step-by-step explanation:

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3 years ago

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weqwewe [10]

The upside down U means intersection

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xxMikexx [17]

These are what you can plot:
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3 years ago

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