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vladimir1956 [14]

3 years ago

7

For his long distance phone service, Alonzo pays a $6 monthly fee plus 8 cents per minute. Last month, Alonzo's long distance bi

ll was $14.88 . For how many minutes was Alonzo billed?

2 answers:

kondor19780726 [428]3 years ago

7 0

Answer:

Alonzo was billed for 111 minutes.

Step-by-step explanation:

In this situation, lets let x = minutes.

0.08x+6=14.88

Subtract the 6 from both sides of the equation.

0.08=8.88

x=8.88÷0.08=111

swat323 years ago

4 0

Monthly fee - $6
Per minute=.8 cents
$14. 88- $6 = $8. 88
8.88÷ .8 = 11.1
Answer= 11 minutes

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Solve for x 5 – 57− 2 = 63 please help

umka2103 [35]

5x - 2x = 63 + 57
3x = 120
x = 40

4 0

3 years ago

WILL GIVE BRAINLIEST IF CORRECT!!

vfiekz [6]

Answer:

$\displaystyle y=-0.927x+13.63$

Step-by-step explanation:

<u>Simple Linear Regression </u>

It a function that represents the relationship between two or more variables in a given data set. It uses the method of the least-squares regression line which minimizes the error between the estimate function and the real data.

Let's compute the best-fit line for the data

$x=\{1,5,6,12,15\}$

$y=\{14,11,4,2,1\}$

First, we find the sums

$\displaystyle \sum x=1+5+6+12+15=39$

$\displaystyle \sum y=14+11+4+2+1=32$

Then, we compute the averages values

$\displaystyle \bar{x}=\frac{39}{5}=7.8$

$\displaystyle \bar{y}=\frac{32}{5}=6.4$

We will also compute the sums of the cross-products and the sum of the squares

$\displaystyle \sum xy=(1)(14)+(5)(11)+(6)(4)+(12)(2)+(15)(1)=137$

$\displaystyle \sum x^2=1^2+5^2+6^2+12^2+15^2=1+25+36+144+225$

$\displaystyle \sum x^2=431$

We will compute Sxy and Sxx

$\displaystyle S_{xy}=\sum xy-\frac{\sum x\ \sum y}{n}$

$\displaystyle S_{xy}=137-\frac{(39)(32)}{5}$

$\displaystyle S_{xy}=-117.6$

$\displaystyle S_{xx}=\sum x^2-\frac{(\sum x)^2}{n}$

$\displaystyle S_{xx}=431-\frac{39}{5}^2=126.8$

The slope of the linear regression function is given by

$\displaystyle m=\frac{S_{xy}}{S_{xx}}=\frac{-117.6}{126.8}=-0.927$

The y-intercept ot the linear function is

$\displaystyle b=\bar{y}-b\bar{x}=6.4-(-0.927)(7.8)$

$\displaystyle b=13.63$

Thus the best-fit line is

$\displaystyle y=-0.927x+13.63$

The correct option is the last one

5 0

3 years ago

What is the range of the values shown on the table? What does the range represent?

hjlf

Answer:

Option D)R: {0 ≤ y ≤ 360}; The range represents the number of miles the car can travel

Step-by-step explanation:

The table in the attached figure

Let

x -----> the amount of gas used in gallons (independent variable)

y ----> the number of miles the car can travel (dependent variable)

In this problem

The domain is the interval -----> [0,12]

$0\ gal \leq x \leq 12\ gal$

The range is the interval ----> [0,360]

$0\ miles \leq y \leq 360\ miles$

3 0

3 years ago

Ethan wants to buy a new watch that cost $112. He pays 0.04 in interest for every $1 that he spends on his credit card. How much

valentina_108 [34]

Answer:

4.48

Step-by-step explanation:

112 x 0.04 = 4.48

3 0

3 years ago

18. Which is more, five-eighths of a dollar or four-ninths of a dollar?

wel

Answer:

five-eighths of a dollar is more than four-ninths of a dollar

Step-by-step explanation:

If you convert the fractions into decimals:

5/8 = 0.625

4/9 = 0.44444444444...

0.625 is closer to 1 than 0.44444444444...

Hope that helped!

4 0

2 years ago