3 years ago

Which

Mathematics

2 answers:

snow_lady [41]3 years ago

6 0

I think it’s C hope that helped

Amanda [17]3 years ago

3 0

$\huge\mathfrak\red{answer}$

Trust me, its C. Associative (Associative property of multiplication)

[mark me brainliest please :( i need 3 more]

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The length, l, of a rectangle is sixteen less than seven times the width, w.

FromTheMoon [43]

The length of the rectangle is: Length or l = 7w - 16

7 0

3 years ago

Number 7. Please asap.

love history [14]

7a)

$\frac{n(n - 3)}{2} = 665\\n(n - 3) = 665 \cdot 2\\n(n - 3) = 1330\\n^2 - 3n = 1330\\n^2 - 3n - 1330 = 0\\n = \frac{-(-3) \pm \sqrt{(-3)^2 - 4 \cdot 1 \cdot (-1330)}}{2 \cdot 1} = \frac{3 \pm \sqrt{9 + 5320}}{2} = \frac{3 \pm \sqrt{5329}}{2} = \frac{3 \pm 73}{2}\\n_1 = \frac{3 + 73}{2} = \frac{76}{2} = 38\\n_2 = \frac{3 - 73}{2} = \frac{-70}{2} = -35$