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3 years ago

A jar contains 5 pink and 8 navy marbles. A marble is drawn at random. What is the probability that the marble is not pink?

Mathematics

1 answer:

7nadin3 [17]3 years ago

5 0

P(not pink) = 8/13
There are 8 marbles that are not pink out of a total of 13 marbles.

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PLSSSSSSSS

Klio2033 [76]

Answer:

Step-by-step explanation:

https://drive.google.com/open?id=1QAvmjDjuwgFX0mUdHlWmqMSCJcOVMw2X

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3 years ago

What is the sum of the roots of the polynomial shown below? f(x) = x^3 + 2x^2 - 11x-12

svp [43]

Answer:

Sum of the roots of the polynomial $x^{3}+2 x^{2}-11 x-12 \text { is }-2$

Solution:

The general form of cubic polynomial is $a x^{3}+b x^{2}+c x+d=0$ ---- (1)

If we have any cubic polynomial $a x^{3}+b x^{2}+c x+d=0$ having roots $\alpha , \beta , \theta$

Sum of roots $\alpha + \beta + \theta$ = $\frac{-b}{a}$ ---(2)

From question given that,

$x^{3}+2 x^{2}-11 x-12$ --- (3)

On comparing equation (1) and (3), we get a = 1, b = 2, c = -11 and d = -12

Hence the sum of roots using eqn 2 is given as,

= $\frac{-2}{1}$

= -2

Hence the sum of the roots of the polynomial $x^{3}+2 x^{2}-11 x-12 \text { is }-2$

4 0

3 years ago

Find the midpoint between two points on a number line if one of the points is at -7, and the other point is at 12.

frosja888 [35]

Answer:

Step-by-step explanation:

The midpoint is the average of the 2 endpoints, that is

midpoint = $\frac{-7+12}{2}$ = $\frac{5}{2}$ = 2.5 → D

3 0

3 years ago

Help me find x on either one of these problems please!

mash [69]

In the problem with the white circle, x=100, in the problem with the blue circle, x might equal 165, but I'm not entirely certain. But I am certain about the first one.

3 0

3 years ago

G(x) = -3/2x-9, if G(x) = -48, find x

Svetlanka [38]

Answer:

x=26

Step-by-step explanation:

first rewrite the problem since u know that G(x)=-48

-48=-3/2x-9

second you want to add the 9 to -48 which gives u -39

-39=-3/2x

third you want to times the reciprocal so it would be

-2/3 times -39/1

u can cross out the negatives and turn them into a positive

fourth you can cross cancel 3 and 39 which now the problem looks like this

2/1 times 13/1

which you would times 2 and 13 which your answer would be

6 0

3 years ago