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3 years ago

Which expression represents the product of an unknown number and 19?

Mathematics

2 answers:

Galina-37 [17]3 years ago

7 0

I would go with D. Hope that helps :)

Vesnalui [34]3 years ago

5 0

D.

19 • n

The dot (•) is an alternative for the multiplication sign (×)

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Sarah and Joe are seeking to join a gym. Sarah saw on television that Great Gym is offering membership at $19.50 per month, plus

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Sarah because if you add up the one time registration fee and the amount per month for one month it would be less than Joe's

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3 years ago

Read 2 more answers

How many terms are in (3x^2-3)(3x^2+3)

Marta_Voda [28]

The number of terms in the expression given is; 2.

<h3>How many term are in the expression given?</h3>

It follows from the task content that the expression given is; (3x^2-3)(3x^2+3).

It therefore follows the converse of law regarding difference of two squares that the expression given can be rewritten as;

= 9x⁴ -9

Read more on difference of two squares;

brainly.com/question/3189867

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7 0

2 years ago

What is the answer to all of them?

melisa1 [442]

The answers are
x=5
n=3
y=4
k=-80

3 0

3 years ago

2p/3 - 12 = -2<br> A: 15<br> B: 7<br> C: 17<br> D: -21

Naddik [55]

the answer is A because indont know 9bp

3 0

3 years ago

The authors of a paper presented a correlation analysis to investigate the relationship between maximal lactate level x and musc

ArbitrLikvidat [17]

Answer:

a) Sample correlation coefficient, r = 0.7411

bi) test statistic, t = 4.102

bii) P-value = 0.000736

Step-by-step explanation:

a) The formula for the sample correlation coefficient is given by the formula:

$r = \frac{S_{xy} }{\sqrt{S_{xx} S_{yy} }} }$

$S_{xx} = 2,648,130.357\\S_{yy} = 36.7376,\\S_{xy} = 7408.225$

$r = \frac{7408.225}{\sqrt{2648130.357*36.7376} }$

r = 0.7511

i) formula for the test statistic is given by the formula:

$t = \frac{r\sqrt{n-1} }{\sqrt{1 - r^{2} } }$

sample size, n = 4

$t = \frac{0.7511\sqrt{14-1} }{\sqrt{1 - 0.7511^{2} } }$

t = 4.102

ii) Degree of freedom, df = n -2

df = 14 -2

df = 12

The P-value is calculate from the degree of freedom and the test statistic using excel

P-value =(=TDIST(t,df,tail))

P-value = (=TDIST(4.1,12,1)

P-value = 0.000736

4 0

3 years ago