Answer:
5/6
Step-by-step explanation:
Answer:
Melvin pays 0.24 dollars less using the loyalty card.
Step-by-step explanation:
We are given that,
Original price payed by Melvin = 1.679 dollars per liter
Using the loyalty card, He pays = 1.439 dollars per liter
So, the difference in the amount of money paid by Melvin is,
Difference = Original price - Price using loyalty card
i.e. Difference = 1.679 - 1.439 = 0.24 dollars
Hence, Melvin pays 0.24 dollars less using the loyalty card.
X=25 ...... ................
X=-2 and y=3.
The first step we take is to substitute the value for y from the second equation into the first equation:
4x+5(3x+9)=7
This is justified by substitution. The next step is:
4x+5*3x+5*9=7
4x+15x+45=7
This is justified by the distributive property. The next step is:
19x+45=7
This is justified by addition of like terms. The next step is:
19x+45-45=7-45
19x=-38
This is justified by the subtraction property of equality. The next step is:
19x/19 = -38/19
x=-2
This is justified by the division property of equality. The next step is:
y=3(-2)+9
y=-6+9
y=3
This is justified by substitution, multiplication and addition, in that order.
