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2 years ago

9

FINAL EXAM PLEASSE HELP

1 answer:

krok68 [10]2 years ago

3 0

f(3) = -4 as 3 lies between 2 and 5

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Mark gets picked up by the bus at 7:40 he arrives at school at 8:10 how long does it take to get to school

Elodia [21]

You could do this in two ways, you could either subtract immediately or convert the time given in hours into minutes
STEP 1:
8:10
- 7:40
which will give 0:30
STEP 2:
8 hours 10 minutes into minutes is
(8 * 60) +10 = 490 minutes
7 hours 40 minutes into minutes is
(7*40) + 40 = 460 minutes
490 - 460
= 30minutes

3 0

3 years ago

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5. Find the discriminant of 15x2 = 4x – 1 and describe

diamong [38]

Answer:

a) The discriminant of the equation = - 44

b)The nature of the roots will be imaginary.

c) $x = \frac{2 +\sqrt{11} i}{15} or, x = \frac{2 - \sqrt{11} i}{15}$

Step-by-step explanation:

Here, the given expression is $15x^{2} = 4x -1$

or, $15x^{2} - 4x + 1 = 0$

Now the discriminant (D) of a quadratic equation $ax^{2} +b x + c = 0$

D = $b^{2} - 4ac = (-4)^{2} - 4(15) (1) = 16 - (60) = -44$

Hence, the discriminant of the equation = - 44

As D< 0, so the roots will be imaginary.

Now,by quadratic formula : $x = \frac{-b \pm \sqrt{b^{2} - 4ac} }{2a}$

So, here $x = \frac{-(-4) \pm \sqrt{D} }{2a} = \frac{4 \pm \sqrt{(-44 )} }{30}$

So, either $x = \frac{4 + \sqrt{(-44 )} }{30} or, x = \frac{4 - \sqrt{(-44 )} }{30}$

or, $x = \frac{2 +\sqrt{11} i}{15} or, x = \frac{2 - \sqrt{11} i}{15}$

8 0

2 years ago

Https://brainly.com/question/22218539

Liula [17]

X=32

ABC=264

Look at image for explanation

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2 years ago

Another one another one...........

USPshnik [31]

Answer:

B

Hope it helped you out

Tysm

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3 years ago

The ratio of students to adults on a field trip is 4 to 3. Which table correctly

Anit [1.1K]

Answer:

B

Step-by-step explanation:

Brainliest?

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2 years ago

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