What number makes the equation _ divided by 8 times 8 equals 225 true

Mathematics

1 answer:

Inga [223]3 years ago

7 0

Answer:

225

Step-by-step explanation:

Let's assume x is the unkown number

so,

$\frac{x}{8}$ * 8=225

both 8's cancel out

and x= 225

so the answer is 225

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How do I write a compound inequality?

ss7ja [257]

Answer:

it can either be written as x > -1 and x < 2 or as -1 < x < 2.

Step-by-step explanation:

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A spotlight on the ground shines on a wall 12 m away. If a man 2 m tall walks from the spotlight toward the building at a speed

Olegator [25]

Answer:

The length of shadow decrease at 0.48 m/s.

Step-by-step explanation:

The distance of man from building = x

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from the diagram (triangle) it can be seen similar triangles with similar base/height ratios.

$\frac{2}{12-x} = \frac{y}{12} \\Y = \frac{24}{12 - x} \\ \frac{dy}{dt} = \frac{24}{(12-x)^{2}} \times \frac{dx}{dt} \\at x=4, dy/dt \ becomes: \\\frac{24}{(12-4)^2} \times -1.3 \\= -0.48 m/s$