Answer:
16 oz for 1.44
Step-by-step explanation:
you want to divide the price by oz to figure out the price for 1 oz
0.90 / 6 = 0.15
1.10 / 10 = 0.11
1.44 / 16 = 0.09
total of ages now is 67 + 4 + 4 = 75
S=shelly
M= Michelle
Michelle is 3 yrs younger than Shelly so use S-3
S +M = 75
replace M with S-3 to get:
S +S-3=75
2S=78
s=39
So shelly is 39
Michelle is 3 years younger = 39-3 = 36
Answer:
27 Chickens
Step-by-step explanation:
<em>Represent the chicken with A and the cows with B</em>
Given
![A + B = 30](https://tex.z-dn.net/?f=A%20%2B%20B%20%3D%2030)
A has 2 legs and B has 4; So:
![2A + 4B = 66](https://tex.z-dn.net/?f=2A%20%2B%204B%20%3D%2066)
Required
Determine A and B
Make B the subject of formula in the first equation
![B = 30 - A](https://tex.z-dn.net/?f=B%20%3D%2030%20-%20A)
Substitute 30 - A for B in the second equation
![2A + 4(30 - A) = 66](https://tex.z-dn.net/?f=2A%20%2B%204%2830%20-%20A%29%20%3D%2066)
Open the bracket
![2A + 120 - 4A = 66](https://tex.z-dn.net/?f=2A%20%2B%20120%20-%204A%20%3D%2066)
Collect Like Terms
![2A - 4A = 66 - 120](https://tex.z-dn.net/?f=2A%20-%204A%20%3D%2066%20-%20120)
![-2A= -54](https://tex.z-dn.net/?f=-2A%3D%20-54)
Divide through by -2
![A = 27](https://tex.z-dn.net/?f=A%20%3D%2027)
<em>Hence, the farmer has 27 chickens</em>
Answer:
50 liters
Step-by-step explanation:
Amount of salt in the 35% solution + amount of salt in the 70% solution = amount of salt in the 45% solution
0.35 x + 0.70 (20) = 0.45 (x + 20)
0.35 x + 14 = 0.45 x + 9
5 = 0.1 x
x = 50
Use equation 2, if input values are greater than 10.