Determine if (3, -1) is a solution to the system. x - 2y= 5
2x- y= 7

a- no, not a solution
b- yes, its a solution

How do you answer this question? (step by step)

What is the explicit rule for the sequence in simplified form? −1,−4,−7,−10,−13… an=4−5n an=−4−3n an=2−3n an=−6−5n

The perimeter of an equilateral triangle is 4 cm more than the perimeter of a square and the length of a side of the triangle is 8 cm more than the length of a side of the aware. find the length of a side of the equilateral triangle