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3 years ago

What are the factor pairs of 21

Mathematics

2 answers:

GarryVolchara [31]3 years ago

3 0

1, 21
3,7
Hope this helps?

oksian1 [2.3K]3 years ago

3 0

1 3 7 21
Hope this helps

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Find the product of 50×28

barxatty [35]

50 times 28, you will get 1400.

If trying to mental calculate, I would :
28=20+8
50 times 20 = 1000
50 times 8 = 400
Then add them up to 1400.

8 0

4 years ago

Find the slope of a line parallel to each given line. 5)2x+3y=-3

Volgvan

Answer:

-2/3

Step-by-step explanation:

2x + 3y = - 3 re-arrange to y = mx+b form: slope of this line will be 'm'

y = -2/3 x -1 slope = -2/3 parallel slope is the same

7 0

2 years ago

Jason scored a total of 38.14points in four events during his state gymnastic compitition.if he had the same score for each even

Solnce55 [7]

That would simply be
38.14 ÷ 4 = 9.535

thus he scored 9.535 on each event

3 0

3 years ago

Question 4 options: Find the mean and standard deviation for a binomial distribution with 680 trials and a probability of succes

lys-0071 [83]

Answer:

Mean for a binomial distribution = 374

Standard deviation for a binomial distribution = 12.97

Step-by-step explanation:

We are given a binomial distribution with 680 trials and a probability of success of 0.55.

The above situation can be represented through Binomial distribution;

$P(X=r) = \binom{n}{r}p^{r} (1-p)^{n-r} ; x = 0,1,2,3,.....$

where, n = number of trials (samples) taken = 680 trials

r = number of success

p = probability of success which in our question is 0.55

So, it means X ~ $Binom(n=680, p=0.55)$

Now, we have to find the mean and standard deviation of the given binomial distribution.

Mean of Binomial Distribution is given by;

E(X) = n $\times$ p

So, E(X) = 680 $\times$ 0.55 = 374

Standard deviation of Binomial Distribution is given by;

S.D.(X) = $\sqrt{n \times p \times (1-p)}$

= $\sqrt{680 \times 0.55 \times (1-0.55)}$

= $\sqrt{680 \times 0.55 \times 0.45}$ = 12.97

Therefore, Mean and standard deviation for binomial distribution is 374 and 12.97 respectively.

3 0

3 years ago

Amy's yearly salary is given by the equation y = 25,000 + 700x, where x is the number of years since 2007 and y is her salary in

yanalaym [24]

2007 would be 0 years since 2007

y=25000+700(0)
y=25000

Answer: Her yearly salary in 2007 was $25,000

Hope this helps:)

3 0

4 years ago