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3 years ago

10

PLS HELP WILL GIVE BRAINLIEST

1 answer:

Sindrei [870]3 years ago

6 0

The answer to this for 13 is c I’m pretty sure I may be wrong

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How do i factor equations?

Pavel [41]

Answer:

If your quadratic equation it is in the form of x^2+bx+c=0 (in other words, if the coefficient of the x^2 term=1), it's possible (but not guaranteed) that a relatively simple shortcut can be used to factor an equation. Find two numbers that both multiply to make C and add to make B.

Step-by-step explanation:

7 0

3 years ago

The quality assurance engineer of a receiving-sets manufacturer inspects receiving-sets in lots of 50. He selects 4 of the 50 re

Mariana [72]

Answer:

0.0430 = 4.30% probability that exactly 2 of the 4 receiving-sets selected by the engineer are defective.

Step-by-step explanation:

Sets are chosen from the sample without replacement, which means that the hypergeometric distribution is used to solve this question.

Hypergeometric distribution:

The probability of x successes is given by the following formula:

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}$

In which:

x is the number of successes.

N is the size of the population.

n is the size of the sample.

k is the total number of desired outcomes.

Combinations formula:

$C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

In this question:

Lots of 50 means that $N = 50$

5 are defective, which means that $k = 5$

4 are selected, which means that $n = 4$

Find the probability that exactly 2 of the 4 receiving-sets selected by the engineer are defective.

This is $P(X = 2)$ . So

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}$

$P(X = 2) = h(2,50,4,5) = \frac{C_{5,2}*C_{45,2}}{C_{50,4}} = 0.0430$

0.0430 = 4.30% probability that exactly 2 of the 4 receiving-sets selected by the engineer are defective.

4 0

3 years ago

Give 3 negative numbers and 2 positive numbers with the sum of 30.

bonufazy [111]

20+20-3-3-4 the 3 3 and 4 are beagative numbers

4 0

3 years ago

What is the rule for the sequence<br>5/6, 1 1/2, 2 1/6, 2 5/6.....

photoshop1234 [79]

First term: a: 5/6
2nd term: 3/2 = 9/6
3rd term: 13/6
4th term: 17/6

a(n+1)=a(n) + 4/6, or a(n+1) = a(n) + 2/3, with a(1) = 5/6

4 0

4 years ago

Please read the attachment below, I need help on this one

Citrus2011 [14]

Answer:

A) 60% B)65%

Step-by-step explanation:

6 0

3 years ago