Mathematics, 15.07.2020 15:01 AmityHeart

PLEASE ANSWER! FIRST CORRECT ANSWER GETS BRAINLIEST!

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Answer from: thatkiddrew4063

The answer should be 20.

Step-by-step explanation:

First, you need to understand the abbreviated list: PEMDAS. I'm not sure if you guys learned this or not, but it helps to know when solving problems like this.

So, if you don't know: PEMDAS is a list of what order you would need to start with when solving a problem. The order is Parentheses, Exponents, Multiplication, Division, Addition and Subtraction.

With that in mind, we'll start by looking at the numbers in the numerator of this fraction. (Doesn't matter if you start with the numerator or denominator first.)

You want to start with the numbers in the parentheses as that is the first letter in the PEMDAS phrase.

(7-6.35) = 0.65

Now, we have division and an addition sign next. According to PEMDAS, you want to start with Division before you Add. So, you will end up having a 10 in the numerator. (I'm assuming you can use a calculator for this, so I'm not showing how to divide the decimals.)

$\frac{(0.65)}{6.5}+9.9=0.1+9.9 =10$

Save that number somewhere for now since we will have to come back to it later. For the denominator, we have a set of parentheses that the problem wants us to focus on so, ignore the $7\frac{1}{24}$ for now.

Start with the first set of numbers that have the division sign in between.

$\frac{1.2}{36} =0.03333$

Don't add just yet after getting this number. You want to divide the 1.2 and $\frac{1}{4}$ since Division needs to be done first before Adding or Subtracting.

$\frac{1.2}{\frac{1}{4} }=4.8$

The resulting numbers in the parentheses should look like this now (we're still ignoring the $7\frac{1}{24}$ at the end after the parentheses):

$(0.03333+4.8-1\frac{5}{16})=3.520833333$

This expression is also the same as this if you wanted to change the fraction at the end of the parentheses:

$(0.03333+4.8-\frac{21}{16})=3.520833333$

Now you can finally take this number and divide it by $7\frac{1}{24}$ or $\frac{169}{24}$ .

$\frac{3.520833333}{\frac{169}{24} }=0.5$

These are really big numbers when you are dividing so hopefully you don't have to solve this all out in your head or by paper. Now, remember that 10 we got from the numerator earlier? We can finally use that here where we have that as our numerator and 0.5 as our denominator.

$\frac{10}{0.5} =20$

This gives you the final answer of 20.

Answer from: Quest

The answer should be 5.

Answer from: Quest

answer: 33 ( approx)

step-by-step explanation:

since, in the linear regression formula, the slope is the a in the equation y = b + ax ( by comparing it with the general equation of line y = mx + c )

where, $a = \frac{\sum y \sum x^2 - \sum x\sum xy}{n\sum x^2 - (\sum x)^2}$

here given table is,

price ($), x : 18 23 25 29 30 33

pairs sold, y : 16 13 10 8 6 2

so, $\sum x = 158$ , $\sum y = 55$ , $\sum xy = 1315$ ,

$\sum x^2 = 4308$ and $\sum y^2 = 629$ ,

thus, slop of the given line is,

$a = \frac{55\times 4308-158\times 1315}{6\times 4308-(158)^2}$

⇒ $a = \frac{29170}{884}$

⇒ $a =32.9977375566$ ≈ 33

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