3 years ago

Evaluate: 18.4 ÷ 2.3 × 3.4 + 13.812 =

Mathematics

1 answer:

ki77a [65]3 years ago

5 0

The answer would be 41.012

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lora16 [44]

Step-by-step explanation:

Let vertical height of ladder from ground be y and

horizontal distance of the base of the ladder from the wall be x respectively.

Length of the ladder = l (constant) = 10 ft

Using Pythagoras theorem:

${l}^{2} = {y}^{2} + {x}^{2}$

Differentiate both sides w.r.t time

$0 = 2y \frac{dy}{dt} + 2x \frac{dx}{dt}$

$y \frac{dy}{dt} + x \frac{dx}{dt} = 0$

We know that (After 1 sec, y = 6 ft and x = 8 ft ; dy/dt = 2 ft/sec)

$6\times 2 + 8\frac{dx}{dt} = 0$

$\frac{dx}{dt} = - 1.5 ft \: per \: sec$

( Ignore - ive sign)

Therefore, bottom of the ladder is sliding away from the wall at a speed of 1.5 ft/sec one second after the ladder starts sliding.

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yulyashka [42]

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3 years ago

What is the additive inverse of -3?

Paraphin [41]

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You are building a new extension and are looking at the plans.referring to the scale, what is the actual measurement of the wall

galina1969 [7]

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