Answer:
10 hour rental
Step-by-step explanation:
Let x = number of hours
HD cost: 7x + 65
L cost: 4x + 95
Set the two cost expressions equal and solve for x, the number of hours.
7x + 65 = 4x = 95
3x = 30
x = 10
The costs are equal for a 10 hour rental.
Answer:
D similar by AA
Step-by-step explanation:
<em>L</em><em> </em>B = <em>L</em><em> </em>D ( right angle)
<em>L</em><em> </em>BCA = <em>L</em><em> </em>DCE (push back angle)
Answer: range= 26, variance= 80 and standard deviation= 8.94
Step-by-step explanation:
Range = highest - lowest
Range = 146 - 120
Range= 26
Let m be mean
M=mean=sum/n
Mean=(120+134+146+127+138+133) / 6
M=798/6
M=133
The standard deviation sample formula:
S.D = sqrt( Summation of |x-m|^2 / n-1)
Let start finding:
|x-m|^2
For 1st: |120-133|^2=169
For 2nd: |134-133|^2=1
For 3rd: |146-133|^2=169
For 4th: |127-133|^2=36
For 5th: |138-133|^2=25
For 6th: |133-133|^2=0
Summation of |x-m|^2 = 400
The standard deviation formula is :
S.D = sqrt( Summation of |x-m|^2 / n-1)
S.D= sqrt(400 / 5)
S.D=sqrt(80)
S.D= 8.94
Variance = (Summation of |x-m|^2 / n-1)
Variance= 400/5
Variance= 80
Answer:
13 level
Step-by-step explanation:
143/55 = 2.6
5 x 2.6 = 13
Answer:
$252.5
Step-by-step explanation:
45(4.5)+50
202.5+50
=252.5
