Step-by-step explanation:
Subtract equation ( ii ) from equation ( i ) :
Remember that the sign of each term of the second expression changes i.e equation ( i ) now becomes -4x -3y = -20
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Again , Substituting the value of y in equation ( ii ) :
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Answer:
The number will be -63
Step-by-step explanation:
Here, we want to give the number of the chosen 25th student
We can see that the numbering follows an arithmetic sequence where a = 9 and d which is the common difference is (6-9) = -3
Mathematically, we can calculate the nth term using the equation below;
Tn = a + (n-1)d
in this case, n = 25, a = 9 and d = -3
So we have
Tn = 9 + (25-1)-3
Tn = 9 -3(24)
Tn = 9-72
Tn = -63
That is known when there is no like terms to be added, and for the case of a fractional function: there is no more common factors between the numerator and the denominator.
Hope that help
One of the answers will be E, I don’t think there are others
Scientific notation : 7.88 × 105
