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sophiagardens227
18.12.2019 •
Mathematics
Iwill give brainliest and 5 stars to correct answer and if you show your work
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Ответ:
So this is an arithmetic sequence with common difference d = -5. We can calculate the sum of that sequence as:
Sum = (first term + last term) * number of terms/2
first term = 1
number of terms = 12
last term = a₁₂ = ?
We know that:
so:
And sum:
Ответ:
Option D
y =
is the equation representing proportional relationship.
Solution:
For the proportional relationship, for all values of x,
must be a constant value.
Let’s check option A.
Divide both the sides by x.
For x = 1,
For x = 2,
So
is different for x = 1 and x = 2.
So option A do not represent proportional relationship.
Similarly for option B and C also there is constant term in the equation.
So option B and C will also have different values of
for two values of x.
For option D
So for all value of x in above case y/x will be 1/3 .hence D is correct option , that is y = (1/3)x is the equation represents proportional relationship.