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2 years ago

Order each set of fractions as indicated: 1/9, 1/20, 1/25, 1/2, 1/50

1 answer:

3 0

Use the least common denominator (LCD) to write these fractions as equivalent fractions with like denominators, and then compare them two at a time

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What is the measurement of the third angle of a triangle if the first two angles measure 63 degrees and 87 degrees?

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Step-by-step explanation:

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2 years ago

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You are situated 300 feet from the base of Tower Glitz Plaza watching an external elevator descend down the side of the building

nordsb [41]

Answer:

18.66 ft/s

Step-by-step explanation:

The distance between you and the elevator is given by:

$h=\sqrt{x^2+y^2}$

The rate of change for the distance between you and the elevator is given by:

$\frac{dh}{dt}=\frac{dh}{dy}*\frac{dy}{dt}$

$-16=\frac{dh}{dy}*\frac{dy}{dt}$

$\frac{dh}{dy}=\frac{d}{dy} (\sqrt{x^2+y^2})\\$

Applying the chain rule:

$u=x^2+y^2\\\frac{dh}{dy}=\frac{d\sqrt u}{du} *\frac{du}{dy}\\\frac{dh}{dy}=\frac{1}{2\sqrt u} *2y\\\frac{dh}{dy}=\frac{y}{\sqrt {(x^2+y^2)}}$

Therefore, at x=300 and y = 500, dy/dt is:

$-16=\frac{y}{\sqrt {(x^2+y^2)}}*\frac{dy}{dt}\\-16=\frac{500}{\sqrt {(300^2+500^2)}}*\frac{dy}{dt}\\\frac{dy}{dt}=-18.66\ ft/s$

The elevator is descending at 18.66 ft/s.

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3 years ago

Please help me on these two questions

irina [24]

Answer:A for the first one and C for the second one

Step-by-step explanation:

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3 years ago

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Points A and Blie in plane R. Line AB does not lie in plane R.<br> always<br> sometimes<br> never

FinnZ [79.3K]

Answer:

Never

Step-by-step explanation: If two points are on the same plane but a line containing those two points is not on the same plane, the statement will never be true. Picture a cube and on one face of the cube lies two points, if there is a line containing those points, the line also has to be on the same side or face. It will always run parallel to the same side but will also always be touching that side.

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2 years ago

Help please area geometry !!

elena55 [62]

Answer:

37.5 cm^2

Step-by-step explanation:

The area of a parallelogram is

A = bh where b is the base and h is the height

A = 7.5 * 5

A = 37.5 cm^2

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3 years ago

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