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3 years ago

I REALLY NEED HELP ON THIS. It's due tomorrow. please help

Mathematics

2 answers:

lys-0071 [83]3 years ago

6 0

Question fourteen is ten but thats all i got

fgiga [73]3 years ago

6 0

14= 10. I hope this helps you in all need and I hope you have a good day

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At a used dealership, let X be an independent variable representing the age in years of a motorcycle and Y be the dependent vari

GarryVolchara [31]

Answer:

a) Selling price y= a + b (age x)

a= 728.025

b= -38.217

Selling price y = 728.025 - 38.217 age x

SSE=8280.25

Step-by-step explanation:

The regression model can be written as

y=a+bx

Here y=selling price and x is age.

So, the regression model will be

Selling price y= a + b (age x)

We have to find the values of "a" and "b"

$b=\frac{nsumxy-(sumx)(sumy)}{nsumx^{2} -(sumx)^2}$

sumx=5+10+12+14+15=56

sumy=500+400+300+200+100=1500

sumxy=5*500+10*400+12*300+14*200+15*100=14400

sumx²=5²+10²+12²+14²+15²=690

n=5

$b=\frac{5(14400)-(56)(1500)}{5(690) -(56)^2}$

b=-12000/314

b=-38.217

ybar=a+bxbar

a=ybar-bxbar

ybar=sumy/n=1500/5=300

xbar=sumx/n=56/5=11.2

a=300-(-38.217)(11.2)

a=300+428.025

a=728.025

Selling price y = a - b(age x)

Selling price y = 728.025 - 38.217 age x

SSE known as sum of square of error can be calculated as

SSE=sum(y-yhat)²

y 500 400 300 200 100

x 5 10 12 14 15

yhat= 728.025 - 38.217 age x 536.940 345.855 269.421 192.987 154.770

y-yhat -36.940 54.145 30.579 7.013 -54.770

(y-yhat)² 1364.56 2931.68 935.08 49.18 2999.75

SSE=sum(y-yhat)²

SSE=1364.56 +2931.68 +935.08 +49.18 +2999.75

SSE =8280.25

4 0

3 years ago

A new car is purchased for 15500 dollars. The value of the car depreciates at 7.5% per year. What will the value of the car be,

mixer [17]

Answer:

$\$9,709.17$

Step-by-step explanation:

we know that

The formula to calculate the depreciated value is equal to

$V=P(1-r)^{x}$

where

V is the depreciated value

P is the original value

r is the rate of depreciation in decimal

x is Number of Time Periods

in this problem we have

$P=\$15,500\\r=7.5\%=0.075\\x=6\ years$

substitute

$V=\$15,500(1-0.075)^{6}=\$9,709.17$

4 0

3 years ago

Adrianna has 10 pieces of gum to share with her friends. There wasn’t enough gum for all her friends, so she went to the store t

muminat

1.) Adrianna has 10 pieces of gum.

2.) She now buys 3 MORE pieces of gum.

3.) 10 (original amount) + 3 (amount bought) = 13 pieces of gum

4.) Adrianna now has 13 pieces of gum to share with her friends.

7 0

4 years ago

Helppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppp

ASHA 777 [7]

Answer:

Step-by-step explanation:

If you look on the axis you can solve the problem

7 0

3 years ago

George has opened a new store and he is monitoring its success closely.

Nataly_w [17]

(r-c)(3) means that you will simply plug in the value 3 as x in the functions r(x) and c(x) and take the difference of both.

Solving for the value of the functions we'll get:
$r(3)= (3)^{2}+5(3)+14=9+15+14=38$
$c(3)= (3)^{2}-3(3)+14=9-9+4=4$
$(r-c)(3)=38-4=34$

Since the value is positive, we can say that the store will profit in its third month. Knowing that r(x) and c(x) is measured in hundreds of dollars, we can also say that the profit will be $3400.

ANSWER: C. The new store will have a profit of $3400 after its third month in business.

4 0

3 years ago

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