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2 years ago

6

An electrician charges $25 to make a house call, plus $40 for every hour of work. Which equation shows how to find C, the total

cost for having the electrician work for h hours?

1 answer:

vlada-n [284]2 years ago

4 0

Answer:

C=40h+25

Step-by-step explanation:

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If f(3x − 1) = 6x − 1, find f(x) and f(0)

klio [65]

f(3x - 1) = 6x - 1

Rewrite 6x - 1 as a function of 3x - 1:

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That is,

f(3x - 1) = 2(3x - 1) + 1

which means

f(x) = 2x + 1

and so

f(0) = 2*0 + 1 = 1

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Y-intercept form is y=-3x+19, I’m not sure what you question is

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Write an expression to represent: The sum of ten and the quotient of a number x and 6.

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2 years ago

*Describe the slopes + the y intercepts of the solutions:

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2 years ago

Read 2 more answers

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

b)

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

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2 years ago