3(2+7) - 9 x 7 = 3+8 x 2 x 2 - 4 = 16 ÷ 2 x 5 x 3 ÷ 6 = Please answer! ✨✨

Mathematics

1 answer:

Thepotemich [5.8K]2 years ago

3 0

Answer:

At first, we have 3 expressions that are equal.

$3(2+7) - 9 \cdot 7= 3+8 \cdot 2 \cdot 2 - 4$

$6+21 - 63= 3+32 - 4$

$-36=31$

$-36\neq 31$

This is not true.

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andre [41]

<h2>Answer: Lines b & c are parallel.⇄</h2>

Step-by-step explanation:

When lines are perpendicular, the product of their slope is -1 (the slopes are negative reciprocal).
When lines are parallel, they have the same slope.

Slope = ( y₂ - y₁) / (x₂ - x₁)

Slope of Line b = ( 6 - 1 ) ÷ ( 1 - 9 )

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Slope of Line c = ( 12 - 7 ) ÷ ( 2 - 10 )

= - ⁵/₈

⇒ Line b ║ Line c