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3 years ago

What is the length of pr

Mathematics

1 answer:

9966 [12]3 years ago

5 0

Answer:

Answer: C. 6

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Please find a and b help asap:)

Gnom [1K]

I think a is 20 and b is 40 or a is 12

4 0

3 years ago

-4y=-20x+40<br> y+10=5x

mart [117]

Answer:

infinitely many solutions

Step-by-step explanation:

We want to find solution to the system:

-4y=-20x+40

y+10=5x

We make y the subject in the second equation to get;

y=5x-10

We substitute y=5x-10 into the top equation to get:

$- 4(5x - 10) = - 20x + 40$

We expand to obtain;

$- 20x + 40= - 20x + 40$

This implies that:

$40 = 40$

Therefore the system has infinitely many solutions.

8 0

4 years ago

(x + 2)(x + 3)(x + 4) can be written in the form x + ax² + bx + c

ELEN [110]

Answer:

$a=9, b=26, c=24$

Step-by-step explanation:

Let's expand the expression bit by bit.

$(x+2)(x+3)=(x)(x)+(x)(3)+(2)(x)+(2)(3)=x^2+5x+6$ by FOIL.

We have that $(x^2+5x+6)(x+4)=x(x^2+5x+6)+4(x^2+5x+6)=x^3+5x^2+6x+4x^2+20x+24=x^3+9x^2+26x+24$ .

So, the answer is $\boxed{a=9, b=26, c=24}$

5 0

3 years ago

A fair die is rolled four times. Find the probability that all four rolls show different numbers

tensa zangetsu [6.8K]

Number of such outcomes, in which each number is no less than the preceding number, will be equal to number of ways of selecting 4 numbers from 6, with replacement; without considering order!

Why?

Lets choose any such set of size 4, say {2, 1, 1, 3}. we can sort it to get a sequence {1,1,2,3} which is one of our desired outcomes. So each such sorted sequence corresponds to one selection of size 4, with replacement and without considering order.

Number of such selections will be equal to number of solutions of following equation:

x1 + x2 + x3 + x4 + x5 + x6 = 4

where:

x1: number of 1 in the selections

x2: number of 2s in the selection

x6: number of 6s in the selection

Number unique solutions of such equation = 9 choose 5 = 126

(For more details on this see : Unordered sampling with replacement )

Number of possible outcomes = 6^4 = 1296

Probability of favorable outcomes = 126/1296=7/72

4 0

3 years ago

Read 2 more answers

PLEASE HELP FOR BRAINLIEST!!

marissa [1.9K]

The answers are in the picture I hope this helps! Pls put me in the brainliest lol

6 0

3 years ago

What is the length of pr​

What is the length of pr