See the attached picture for the steps and answer.
If a = 7, b = 3, and c = 5, then 4a − 3c =
1 answer:
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In this question, it is given that the eighth term is 78 and the explicit formula is
And the recursive formula is
And we have to find the 20th term . And for that, we put 20 for x in the explicit formula. That is
Therefore on using the explicit formula, we will get 198 as the 20th term .
Answer:
(3,-2)
Step-by-step explanation:
Part A:
1) <em>Isolate x in x - y = 5</em>
x = y + 5
2) <em>Substitute that x into 4x+y=10</em>
4(y + 5) + y = 10
4y + 20 + y = 10
5y = 10-20
5y = -10
y = -2
3) Use y to solve for x:
x = -2 + 5
x = 3
Part B:
<em>Verify using results from Part A</em>
3 - (-2) = 5
4(3) + (-2) = 12 - 2 = 10
Part C:
<em>Just graph the equations and see where they intersect, which is exactly (3,-2). We got that in Part A and B</em>
