4a-13=19 add 13 to both sides
4a=32 divide by 4 on both sides
a=8
Answer:
Step-by-step explanation:
From the question we are told that:
Dimension Of rectangle
Length 
Breath 
Velocity 
Generally the equation for distance travel by Marsol once round the Circle is is mathematically given by
Where
And
Therefore
12, 15, 15, 18, 20, 29, 33, 42
18 and 20 are in the middle, add and divide to find the answer.
18 + 20 = 38
38 / 2 = 19
19 is the median.
Your first line calculation is already true but reversed. The demand will decrease (that mean the formula would be minus) by 20 gallons for every $0.4 price increase, which means 50 gallons/$. To find the formula you need to insert one sample of either the first equation (65gallon and $3.1) or 2nd equation (45 gallons and $3.5). The formula for demand should be:
q= C - 50p
65 gallon= C- 3.1 * 50
C= 65 gallon + 155 gallon= 220 gallon
The formula would be:
q= 220- 50p
So the second question can be solved by putting 0 on the Q. It would be:
q= 220- 50p
0=220-50p
50p=220
p= $4.4
