All categories

2 years ago

Plzz help me i hate word problems

Mathematics

1 answer:

aliya0001 [1]2 years ago

3 0

Unfortunately, I can't read it..about 42 grams should be the answer.

You might be interested in

Please will give brainliest and thanks

Paraphin [41]

Answer:

Kahn academy works great with this stuff

Step-by-step explanation:

7 0

2 years ago

Read 2 more answers

Please this is my last problem and all my points just solve this for im begging

zheka24 [161]

Answer:

72.54

Step-by-step explanation:

Use formula for trapezoid: a+b/2 * h

5 0

2 years ago

Read 2 more answers

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

2 years ago

4x-2=18 find what x means

MakcuM [25]

4x-2=18 -2 on both sides 4x=16 divid by 4 on both sides x= 4

6 0

3 years ago

Is this right ? can any of you check them thanksss

katrin [286]

No if I’m correct it should be 40 degrees

7 0

2 years ago