Answer:
Step-by-step explanation:
-x + 5y - 7 = 0
-x + 5y = 7 --------------------(I)
4y - 10 = 5x
-10 = 5x - 4y
5x - 4y = -10 -----------------------(II)
-x + 5y = 7 --------------------(I)
5x - 4y = -10 -----------------------(II)
Multiply equation (I) by 5.
(I)*5 -5x + 25y = 35
(II) <u>5x - 4y = -10</u> {Now add and x will be eliminates}
21y = 25
y = 25/21
Substitute y value in Equation (I)
-x + 5*25/21 = 7
-x + 125/21 = 7
-x = 7 - (125/21)
-x = (147/21) - (125/21)
-x = (147-125)/21
-x = 22/21
x = -22/21
The answer is D because remember an open dot means that it isn't part of the answer and a closed dot means that it is part of the solution. So if 62 is the minimum number that they can retire at, they can also retire later than that. so it's D.
Answer:
I don't get what you are trying to ask.
<h3>
Answer: k = 3</h3>
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Explanation:
- A = first term = k+2
- B = second term = 4k-6
- C = third term = 3k-2
To go from the first term to the second term, we add on some common difference d.
So,
B = A+d
B = (k+2)+d
4k-6 = k+2+d
4k-6-k-2 = d
d = 3k-8
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Similarly, to go from the second term to the third term, we also add on d
C = B+d
C = (4k-6)+d
C = (4k-6)+(3k-8)
C = 7k-14
3k-2 = 7k-14
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Let's solve for k
3k-2 = 7k-14
-2+14 = 7k-3k
12 = 4k
4k = 12
k = 12/4
k = 3 is the final answer
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If k = 3, then we have these three terms:
- A = k+2 = 3+2 = 5
- B = 4k-6 = 4(3)-6 = 6
- C = 3k-2 = 3(3)-2 = 7
The arithmetic progression (AP) is 5, 6, 7. The common difference is d = 1.
Note how d = 3k-8 = 3(3)-8 = 1