Answer:
The solution is x = -2 and y = 2.
Step-by-step explanation:
Given that:
14y - 8x = 44 Eqn 1
-7y = -x - 16 Eqn 2
In elimination method, you try to eliminate one variable in the equation by adding or subtracting.
Multiplying Eqn 2 by 2
2(-7y = -x - 16)
-14y=-2x-32
-14y+2x= -32 Eqn 3
Adding Eqn 1 and 3
(14y-8x)+(-14y+2x)=44+(-32)
14y-8x-14y+2x=44-32
-6x=12
Dividing both sides by -6
![\frac{-6x}{-6}=\frac{12}{-6}\\x=-2](https://tex.z-dn.net/?f=%5Cfrac%7B-6x%7D%7B-6%7D%3D%5Cfrac%7B12%7D%7B-6%7D%5C%5Cx%3D-2)
Putting x=-2 in Eqn 2
-7y=-(-2)-16
-7y=2-16
-7y=-14
Dividing both sides by -7
![\frac{-7y}{-7}=\frac{-14}{-7}\\y=2](https://tex.z-dn.net/?f=%5Cfrac%7B-7y%7D%7B-7%7D%3D%5Cfrac%7B-14%7D%7B-7%7D%5C%5Cy%3D2)
Hence,
The solution is x = -2 and y = 2.
Answer:
![{x}^{2} + (6x)](https://tex.z-dn.net/?f=%20%7Bx%7D%5E%7B2%7D%20%20%2B%20%286x%29)
Step-by-step explanation:
just add the separate areas
The correct answer is B. 8<=l<=10. You can find this because we know the length is 2 feel more than the width, so when the length is provided, we can find the area. 8*6 is 48, which is the minimum area, and 10*8 is 80, which is the maximum area allowed.
Answer:
£60
Step-by-step explanation:
Let the original cost be x.
x × (1 - 20%) = 48
0.8x = 48
x = 48/0.8
x = 60
The original cost was £60 before the sale.
P = g - 50
The profit in this equation, p, is similar to the y value and the g in this equation is equal to the x value. Because the profit per glass sold is one, you can just leave it out end up with g - 50 because you are deducting your profit from your expense.