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4 years ago

What are the exponent and coefficient of the expression -2a ?

Mathematics

2 answers:

Andrew [12]4 years ago

5 0

Assuming that there was no error in you typing, the exponent is 1 and the coefficient is -2

anzhelika [568]4 years ago

5 0

Answer: the exponent is 1

and the coefficient is -2

Step-by-step explanation:

the coefficient is the number beside the variable and anything powered by one remains the same

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Frank and Linda just finished a meal and received their bill for $47.60. They would like to leave their server a 20 percent tip.

meriva

Answer:

Step-by-step explanation:

Tips = 20% of 47.60

= (20/100) * 47.60

= 0.20 * 47.60

Total bill = 47.60 + (0.2)*(47.60)

6 0

3 years ago

Read 2 more answers

How much more is 1.8 • 10^11 greater than 7.2 • 10^10

Rasek [7]

Answer:

1.8.10=1.80000000000

7.2.10=7.2000000000

Step-by-step explanation:

6 0

3 years ago

How can you multiply 5 x 2/12

Nikitich [7]

Answer:

12 1/2

Step-by-step explanation:

Hi Glenishagreaves!

The easiest way to begin is to convert 2 $\frac{1}{2}$ to an improper fraction.

2 × 2 = 4 + 1 = 5.

So 2 $\frac{1}{2}$ = $\frac{5}{2}$

5 × $\frac{5}{2}$ = $\frac{25}{2}$

Converting to a mixed number gives a final answer of $\boxed{12 \frac{1}{2} }$$ .

6 0

3 years ago

10. A random sample of 10 fibers is taken from a collection of 92 fibers that consists of 43 fibers of polymer A, 17 fibers of p

vazorg [7]

Answer:

0.1150 = 11.50% probability that the sample does not contain any fibers of polymer B

Step-by-step explanation:

Hypergeometric distribution:

The probability of x sucesses 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 sucesses.

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:

Fibers are chosen without replacement, which means that we use the hypergeometric distribution.

92 fibers means that $N = 92$

Sample of 10 means that $n = 10$

No polymeter B which means that $x = 0$

17 fibers of polymeter B which means that $k = 17$

a. What is the probability that the sample does not contain any fibers of polymer B

This is P(X = 0).

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

$P(X = 0) = h(0,92,10,17) = \frac{C_{17,0}*C_{75,10}}{C_{92,10}} = 0.1150$

0.1150 = 11.50% probability that the sample does not contain any fibers of polymer B

4 0

3 years ago

Please help I need it. I know that it is not b

poizon [28]

Answer:

The answer is C

Step-by-step explanation:

I don't know the answer but I know it is letter C

7 0

3 years ago