Answer:

Step-by-step explanation:
Just because before y there is negative "-" thus youve got to put it before 18. Eventually the answer is -18,not 22
Answer: 24 Hours
Step-by-step explanation:
6 Motorcycles = 9 Hours
divide the hours by the motorcycles and you get 1.5, so that is how long it takes for one motorcycle.
Multiply 16 by 1.5 and you get 16 Motorcycles in 24 Hours
Step-by-step explanation:
we find the average height of each height first,
t¹= (120+124)/2
=244/2
=122
t²= (124+128)/2
t²= 252/2
t²= 126
t³= (128+132)/2
t³= 260/2
t³= 130
t⁴= (132+136)/2
t⁴= 268/2
t⁴ =134
t⁵= (136+140)/2
t⁵= 276/2
t⁵= 138
so multiplying each height by its frequency we can find the total height, so we have..
total height= (122*7)+(126*8)+(130*13)+(134*9)+(138*3)
= 854+1008+1690+1206+414
= 5172
mean height = total height/total frequency
= 5172/40
=129.3
Answer:
$10.348
Step-by-step explanation:
(3.98)(2.6)= 10.348