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4 years ago

How do I find roots from a quadratic equation

1 answer:

6 0

Answer:The roots of any quadratic equation is given by: x = [-b +/- sqrt(-b^2 - 4ac)]/2a. Write down the quadratic in the form of ax^2 + bx + c = 0. If the equation is in the form y = ax^2 + bx +c, simply replace the y with 0. This is done because the roots of the equation are the values where the y axis is equal to 0.

Step-by-step explanation:

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Please help me with this math problem!! Will give brainliest!! :)

lora16 [44]

Answer:

$2x^3-3x^2-10x+15\\$

Step-by-step explanation:

To find (fg)(x), we have to look at f(x) and g(x) and multiply the two quantities together. We are already given the two quantities individually so all that is left is the multiplication:

$(fg)(x)=(-2x+3)(5-x^2)=-10x+2x^3+15-3x^2\\$

If we reorder the terms to go from highest degree to lowest, we get our final answer to be the following:

$2x^3-3x^2-10x+15$

6 0

1 year ago

If a distribution follows the binomial distribution with n = 40 and probability of success of 0.35, calculate the mean and varia

Anna71 [15]

Answer:

mean=14, variance=9.1

Step-by-step explanation:

for binomial distribution

n=number of outcomes

p=probability of succcess

q=probability of faliure

p+q=1

any probability given is always 'p'

mean=np

n=40

p=0.35

mean=40*0.35

mean=14

variance=npq

p+q=1

q=1-p

q=1-0.35

q=0.65

variance=40*0.35*0.65

variance=9.1

7 0

3 years ago

Can you please help me on 9 and 10?

Mashcka [7]

Answer:

Step-by-step explanation:

$\bold{Q9.}\\\\\dfrac{3}{14}=3:14\approx0.214=0.214\cdot100\%=21.4\%\\\\\bold{A.\ NOT}\ 7\%0.214$

$\bold{Q10.}\\\\\text{The scientific notation:}\ a\times10^k,\ \text{where}\ 1\leq a$

4 0

3 years ago

Read 2 more answers

Help!!!! What is the answer??????

ANTONII [103]

Answer:I think is A

Step-by-step explanation:

5 0

3 years ago

If the diameter of a circle is 10 inches, find the radius.

Serjik [45]

Answer:

5 inches

Step-by-step explanation:

7 0

3 years ago