3 years ago

Add. (−5x4+6x2−43)+(6x4−x2+12x+12) Express the answer in standard form. Enter your answer in the box.

Mathematics

2 answers:

Elan Coil [88]3 years ago

4 0

Answer:

x^2+12x-15

Step-by-step explanation:

julia-pushkina [17]3 years ago

3 0

Answer:

Step-by-step explanation:

(-5x4+6x2-43)+(6x4-x2+12x+12)

(x4+5x2+12x-31)

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How many feet long is the shadow of a 15-foot flagpole if a 5-foot woman standing at the base of the flagpole has a shadow that

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The height of flagpole is 12.5 feet.

Step-by-step explanation:

Given,

Height of woman = 5 foot

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Ratio of height to shadow = 5:6

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Height of flagpole = x

Ratio of height to shadow = x:15

Using proportion;

Ratio of height to shadow :: Ratio of height to shadow

$5:6::x:15\\$

Product of mean = Product of extreme

$6*x=15*5\\6x=75$

Dividing both sides by 6

$\frac{6x}{6}=\frac{75}{6}\\x=12.5$

The height of flagpole is 12.5 feet.

Keywords: ratio, proportion

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