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4 years ago

I really need help before tomorrow!! Please help me!!

Mathematics

2 answers:

Pavel [41]4 years ago

8 0

Answer:

the answer is 6

Step-by-step explanation:

you take the absolute value for both of them which is 2 and 8 but you keep the negative still so it would be -2+8 which is 6

Charra [1.4K]4 years ago

3 0

Answer:

Step-by-step explanation:

The absolute value of -2 is 2, but with the negative on the outside it would be -2.

Next the absolute value of -8 is 8.

Therefore 8+-2=6

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According to industry sources, online banking is expected to take off in the near future. The projected number of households (in

Airida [17]

Answer:

(a) The least-square regression line is: $y=4.662+2.709x$ .

(b) The number of households using online banking at the beginning of 2007 is 31.8.

Step-by-step explanation:

The general form of a least square regression line is:

$y=\alpha +\beta x$

Here,

y = dependent variable

x = independent variable

α = intercept

β = slope

(a)

The formula to compute intercept and slope is:

$\begin{aligned} \alpha &= \frac{\sum{Y} \cdot \sum{X^2} - \sum{X} \cdot \sum{XY} }{n \cdot \sum{X^2} - \left(\sum{X}\right)^2} \\\beta &= \frac{ n \cdot \sum{XY} - \sum{X} \cdot \sum{Y}}{n \cdot \sum{X^2} - \left(\sum{X}\right)^2} \end{aligned}$

The values of ∑X, ∑Y, ∑XY and ∑X² are computed in the table below.

Compute the value of intercept and slope as follows:

$\begin{aligned} \alpha &= \frac{\sum{Y} \cdot \sum{X^2} - \sum{X} \cdot \sum{XY} }{n \cdot \sum{X^2} - \left(\sum{X}\right)^2} = \frac{ 68.6 \cdot 55 - 15 \cdot 218.9}{ 6 \cdot 55 - 15^2} \approx 4.662 \\ \\\beta &= \frac{ n \cdot \sum{XY} - \sum{X} \cdot \sum{Y}}{n \cdot \sum{X^2} - \left(\sum{X}\right)^2} = \frac{ 6 \cdot 218.9 - 15 \cdot 68.6 }{ 6 \cdot 55 - \left( 15 \right)^2} \approx 2.709\end{aligned}$

The least-square regression line is:

$y=4.662+2.709x$

(b)

For the year 2007 the value of x is 10.

Compute the value of y for x = 10 as follows:

$y=4.662+2.709x$

$=4.662+(2.709\times10)\\=4.662+27.09\\=31.752\\\approx 31.8$

Thus, the number of households using online banking at the beginning of 2007 is 31.8.

5 0

3 years ago

At pizza Pi, 8% of the pizzas made last week had extra cheese. If 2 pizzas had extra cheese, how many pizzas in all were made la

kondor19780726 [428]

Answer:

$25\ pizzas$

Step-by-step explanation:

we know that

2 pizzas that had extra cheese represent 8% of the total of pizzas

by proportion

Find the number of total pizzas

$\frac{2}{8\%}=\frac{x}{100\%}\\ \\x=100*2/8\\ \\x=25\ pizzas$

7 0

3 years ago

What is the mode of the data set?

lisabon 2012 [21]

The mode is the number that shows up the most

103, 77, 90, 102, 103, 81, 78, 84, 84, 87, 99, 103, 118

reorder the numbers

77, 78, 81, 84, 84, 87, 90, 99, 102, 103, 103, 103, 118

103 shows up 3 times, one more than the next group (84)

103 is your answer

hope this helps

6 0

3 years ago

Read 2 more answers

Someone please help me with this

qwelly [4]

Answer:

165x>_ 175y

Step-by-step explanation:

Car #1 is x while Car #2 is Y, since Car #1 went at least the same amount of distance of car #2, it means that Car #1 either went farther or has the same distance as car #2. (Make sure you choose greater than or equal to sign not greater than!)

7 0

3 years ago

A ball is released at a height of 8 inches to roll inside a half - cylinder. It rolls to a height of 2 inches on the other side

vladimir1956 [14]

Answer:

c. 1/8 in

Step-by-step explanation:

8 0

4 years ago