The sum of the first n natural numbers and 0=
n*(n+1)/2
Step-by-step explanation:
Two lines that are perpendicular to each other has -1 as the product of thir gradient.
Since the gradient of the line y = 3 - x is -1, the gradient of the other line must be 1.
So y = x + c.
When x = 7, y = 1. 1 = 7 + c, c = -6.
Hence the equation of the line is y = x - 6.
Answer:
5 bows
Step-by-step explanation:
Total feets of ribbon = 3 1/2
Fraction required to make a bow = 2/3
Number of bows that can be made = (total ribbon / Fraction required to make a bow)
3 1/2 ÷ 2/3
7/2 ÷ 2/3
7/2 * 3/2
= 21 / 4
= 5.25