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3 years ago

Helpppoooooppppppp pllalsssssss

Mathematics

1 answer:

kiruha [24]3 years ago

5 0

Answer:

Step-by-step explanation:

A)55 + 12 + 43=110

B) 55+14+40=98

C)55 + 16 +37 =108

HOW MUCH DOSE THE ENTERE THINK NEED TO BE WHAT THE AMOUNT ???

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What is a polynomial with a single root at x = -1 and a double root at x = 6?

Kazeer [188]

In article <[email protected]>,
[email protected] (Hauke Reddmann) wrote:

<span>> Let a*x**3+b*x**2+c*x+d=0 have a double and a single root.
> What's the value of the single root?</span>

2 3
d (-9 d a + 4 d b c - c )
----------------------------------
2 2 2 2 4
6 d c a + 4 d b - 5 b c d + c

<span>or any other expression equivalent under </span>

2 2 3 2 2 3
(27 d a + 4 b d - 18 c a d b - b c + 4 c a) = 0

which is the discriminant condition for the double root to occur (a being
nonzero assumed).

Maple verification:

> f:=a*x^3+b*x^2+c*x+d;
3 2
f := a x + b x + c x + d

> dis:=factor(resultant(f,diff(f,x),x));
2 2 3 2 2 3
dis := a (27 d a + 4 b d - 18 c a d b - b c + 4 c a)

>
factor(subs(x=d*(-9*d^2*a+4*d*b*c-c^3)/(6*d^2*c*a+4*d^2*b^2-5*b*c^2*d+c^4),f));

3 4 2 3 2 3 3 3 2 2 2 4
d (-27 d a + 36 d a b c - 9 d a c + 16 d b - 24 d b c + 9 d b c

6 2 2 3 2 2 3 /
- c ) (27 d a + 4 b d - 18 c a d b - b c + 4 c a) /
/

2 2 2 2 4 3
(6 d c a + 4 d b - 5 b c d + c )

<span>> (Bonus points if it's possible to write the answer without
> using fractions, just as polynome(a,b,c,d) )</span>

Impossible, multiplying all a,b,c,d by the same factor lambda should
preserve the solution but cannot preserve a polynomial expression.
<span>--</span>

4 0

3 years ago

Find the value of f(5) for the function. f(a) = 4(a + 4) - 3

MrRissso [65]

Answer:

$f(a) = 4(a + 4) - 3 = 4a + 16 - 3 \\ f(x) = 4a + 13 \\ f(5) = 4(5) + 13 = 20 + 13 \\ \boxed{f(5) = 33}$

<h2>33 is the right answer.</h2>

3 0

3 years ago

A bag contains 2 white marbles and 7 purple marbles. Two marbles are drawn at random. One marble is drawn and not replaced. Then

Masja [62]

A.
$\frac{7purple}{9total} * \frac{2white}{8total} \\ \frac{14}{72} \\ =0.194$
The denominator of the second number goes down one because you aren't replacing the initial marble pulled, making the amount of marbles in the bag go down, but not affecting the white count because you pulled a purple marble.
b.
$\frac{2white}{9total} * \frac{1white}{8total} \\ \frac{2}{72} \\ =0.278$
The same can be said about the denominator for this problem, but not the numerator. The numerator must go down one number as well, because you already chose one white marble, taking one of the white marbles out of the bag, leaving you with one solitary, white marble.
c.
Chance of selecting two purple marbles:
<u /> $\frac{7purple}{9total} * \frac{6purple}{8total} \\ \frac{42}{72} \\ =0.583$
Chance of selecting two white marbles:
$\frac{2white}{9total} * \frac{1white}{8total} \\ \frac{2}{72} \\ =0.278$
<u>Chance of selecting two purple</u> vs. <em>Chance of Selecting 2 white:</em>
<u>0.583</u>><em>0.278</em>.
It is more likely to select 2 purple marbles.

Hope this helps!

6 0

3 years ago

Read 2 more answers

A girl is 30 months old. What is her age in years and months?

jeyben [28]

Answer:

She is 2 years and 6 months old.

7 0

3 years ago

Find the scale factor of the figures below from left to right given the volume of each .

Fudgin [204]

<h3>Answer is choice D) 5:3</h3>

Explanation:

The volumes are in the ratio 3625:783 which reduces fully to 125:27 after dividing both parts by the GCF 29.

Both 125 and 27 are perfect cubes because 125 = 5^3 and 27 = 3^3

Therefore, the volume ratio 125:27 turns to the linear scale factor ratio 5:3

If you were to cube both sides of the linear ratio 5:3, you would get the volume ratio 125:27. Cube rooting both sides will have you go in reverse.

6 0

3 years ago