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3 years ago

9

(3x)2 – 7y2, when x = 3 and y = 2

2 answers:

denis23 [38]3 years ago

4 0

$3 \times 3 \times 2 - 7 \times 2 \times 2 \\ 18 - 28 \\ - 10$

baherus [9]3 years ago

3 0

Answer:

115

Step-by-step explanation:

(3x)^2 – 7y^2

Plug in:

(3×3)^2 – 7×2^2

9^2 - 14^2

81 - 196

115

Hope this helped.

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alexgriva [62]

Answer:

<em>86.20 ft²</em>

Step-by-step explanation:

<em>Hi there !</em>

<em>A = A₁ + A₂</em>

<em>A₁ =semicircle</em>

<em>A₁ = πr²/2</em>

<em>r = d/2 = 6.4ft/2 = 3.2 ft</em>

<em>A₁ = 3.14×(3.2ft)²/2 ≈ 32.15 ft²</em>

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<em>A₂ = trapezium</em>

<em>A₂ = (b + B)×h/2</em>

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<em>A = 32.15 ft² + 54.05 ft² = 86.20 ft²</em>

<em>Good luck !</em>

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Answer:

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