Answer:
Step-by-step explanation:
<u><em>14h + 400 ≥ 2500</em></u>
14h ≥ 2100
h ≥ 150
<em>150</em> is minimum number of <em>hours</em> Ahmed must to work to meet his goal.
Answer:
(2,-3)
Step-by-step explanation:
2x + 2y = -2
3x - 2y = 12
Add the two equations to eliminate y
2x + 2y = -2
3x - 2y = 12
-----------------------
5x = 10
5x/5 = 10/5
x = 2
Now find y
2x+2y = -2
2(2)+2y = -2
4+2y = -2
Subtract 4 from each side
4-4 +2y = -2-4
2y = -6
Divide by 2
2y/2 = -6/2
y = -3
(2,-3)
(x,y) --> (y,-x) so the answer will be (-7,-3)
See explanation for the incorrect step.
Step-by-step explanation:
The steps for solving simultaneous equations by elimination method are;
- Naming the equations (i) and (ii)
- Multiplying each equation by a suitable number so that the two equations have the same leading coefficients
- Subtracting the second equation (ii) from the first equation (i)
- Solving the new equation for value of x or y
- Substituting the value of x or y in equation (i) or (ii)
- Getting the solutions
In this case, the equations are;
5x+3y=5-------------- (i)
8x+2y=6-------------- (ii)
--------------multiplying equation (i) by 2 and (ii) by 3
10x+6x=10
24x+6y=18
-------------------performing subtraction
14x=8 --------divide both sides by 14 to remain with x
14x/14 =8/14
x=8/14 = 4/7
Substitute value of x in equation (i)
5(4/7) +3y =5
20/7 +3y =5 -------collect like terms
3y= 5- 20/7
3y=15/7
y=5/7
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Elimination Method :brainly.com/question/11962747
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