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3 years ago

What is the solution factoring by polynomial (3x+2y)(x+2y)

Mathematics

1 answer:

hodyreva [135]3 years ago

6 0

Answer:

3x²+8xy+4y²

Step-by-step explanation:

Opening brackets,

3x²+6xy+2xy+4y²

=3x²+8xy+4y²

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Tammy bought 20 pounds of flour for $11.<br> How many pounds of flour did she get per dollar?

frozen [14]

Answer:

1.82 pounds per dollar

Step-by-step explanation:

20/11= 1.82

6 0

3 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.

7 0

3 years ago

how do i get the answer and what is the answer? im looking for a right answer not just someone who types in the mayo mayo

ankoles [38]

Answer:

x = 51°

Step-by-step explanation:

The straight line segment has a total angle of 180°. Therefore, to find the angle inside the triangle that is next to 94°, subtract 94 from 180:

180° - 94° = 86°

That angle is almost a right angle but not quite. Now, to find x, add up the two angles inside the triangle and subtract it from 180°:

43° + 86° = 129°

180° - 129° = 51°

5 0

3 years ago

Percent error that is greater than 20% but less than 50%

NNADVOKAT [17]

Answer:

30 40 percent

Step-by-step explanation:

it is less that 50

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3 years ago

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What is the answer to this problem

Svetlanka [38]

Answer: P = $47,120.53

4 0

2 years ago