<h3>S O L U T I O N :-</h3>
The value of y is -10.
Answer:
Step-by-step explanation:
<h3><u>Given expression:</u></h3>
= 
![= 3x(3x^2+3x+8)-1(3x^2+3x+8)\\\\Multiply\\\\=9x^3+9x^2+24x-3x^2-3x-8\\\\Combine \ like \ terms\\\\= 9x^3+9x^2-3x^2+24x-3x-8\\\\= 9x^3+6x^2+21x-8\\\\\rule[225]{225}{2}](https://tex.z-dn.net/?f=%3D%203x%283x%5E2%2B3x%2B8%29-1%283x%5E2%2B3x%2B8%29%5C%5C%5C%5CMultiply%5C%5C%5C%5C%3D9x%5E3%2B9x%5E2%2B24x-3x%5E2-3x-8%5C%5C%5C%5CCombine%20%5C%20like%20%5C%20terms%5C%5C%5C%5C%3D%209x%5E3%2B9x%5E2-3x%5E2%2B24x-3x-8%5C%5C%5C%5C%3D%209x%5E3%2B6x%5E2%2B21x-8%5C%5C%5C%5C%5Crule%5B225%5D%7B225%7D%7B2%7D)
Answer:
x > –3; 5y ≥ –4x – 10
Step-by-step explanation:
The dashed vertical line is the inequality x > -3 or x < -3. All vertical lines have the form x = a. Since it is dashed then the sign must be < or >.
The solid line has a y-intercept at -2 and a slope of -4/5. This means it must be the equation y ≥ -4/5x -2 or y ≤ -4/5x - 2. This is the same equation as 5y ≥ -4x - 10.
So the solution is x > –3; 5y ≥ –4x – 10.
Answer:
(6, - 1 )
Step-by-step explanation:
Given the 2 equations
x + 7y = - 1 → (1)
- 4x - 2y = - 22 → (2)
Rearrange (1) expressing x in terms of y by subtracting 7y from both sides
x = - 1 - 7y → (3)
Substitute x = - 1 - 7y into (2)
- 4(- 1 - 7y) - 2y = - 22 ← distribute and simplify left side
4 + 28y - 2y = - 22
4 + 26y = - 22 ( subtract 4 from both sides )
26y = - 26 ( divide both sides by 26 )
y = - 1
Substitute y = - 1 into (3) for corresponding value of x
x = - 1 - 7(- 1) = - 1 + 7 = 6
Solution is (6, - 1 )
Answer:
It can't buy a bike for 570 and sell it fo 100. They'll just be losing money on top of rent
Step-by-step explanation:
