3 years ago

State whether the surface of the water in an aquarium is best modeled by a point, a line, a ray, or a plane.

1 answer:

7 0

A line would be best used to model the surface of an aquarium, by putting a line on top of the surface and checking if the water is level or not.

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lana [24]

Answer:

Follows are the solution to this question:

Step-by-step explanation:

Please find the attached file for the complete solution.

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2 years ago

Choose the correct simplification of the expression (−2x + 8y)(9x − 3y).

Romashka-Z-Leto [24]

For these kinds of expressions use FOIL (first, outside, inside, last).

-2x • 9x = -18x^2
-2x • -3y = 6xy
8y • 9x = 72 xy
8y • -3y = -24y^2

Now combine them all:

-18x^2 + 78xy - 24y^2

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3 years ago

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Sonja [21]

Answer:

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3 years ago

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Help help help help help

Nesterboy [21]

Answer:

$b = \sqrt{65}$

Step-by-step explanation:

${b}^{2} + {4}^{2} = {9}^{2} \\ {b}^{2} + 16 = 81 \\ {b}^{2} = 81 - 16 \\ {b}^{2} = 65 \\ b = \sqrt{65}$

I hope I helped you^_^

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3 years ago

4log, 11 – 20log 35

ANEK [815]

Answer:

-26.71579

Step-by-step explanation:

Any scientific or graphing calculator can evaluate this expression for you.

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