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laila [671]
3 years ago
13

The job paid $25 for every 2 hours of work. Write an equation that represents how much the jobs pays, y, for x hours of work.

Mathematics
1 answer:
sergejj [24]3 years ago
6 0

Answer:

$12,5xy

Step-by-step explanation:

y = how much the jobs pays

x = hours of work

25 \div 2

= 12.5xy

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Macy bought a total of 12 fiction and non-fiction books. The fiction books cost $12 each and the
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fiction books = 4

non fiction books = 8

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let number of fiction books be X so

non fiction books will be 12-X

12X + 25(12-X) = 248

12X -25X = -53

X = 4( fiction books)

12-4 = 8 (non fiction)

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The angle of elevation to the top of a water tower from point A on the ground is 19.9°. From point B, 50.0 feet closer to the to
zepelin [54]

Answer:

Answer in terms of a trigonometric function :

h = \frac{20tan(19.9)}{0.4-tan(19.9)}

Answer in figures

h = 190.5 feet

Step-by-step explanation:

Consider the sketch attached below to better understand the problem.

Let x be the distance between point B and the base of the water tower.

tan (19.9)=\frac{h}{50+x} ---------------equation 1\\

tan (21.8)=\frac{h}{x}----------------equation 2

From equation 2,

x =\frac{h}{tan21.8}=\frac{h}{0.4}

substituting the value of x into equation 1, we get

tan (19.9)=\frac{h}{50+(\frac{h}{0.4} )}

tan 19.9=h\times \frac{0.4}{20+h}

cross multiplying,

20\times tan(19.9) +htan(19.9)=0.4h

20tan(19.9)= h(0.4-tan(19.9))

h= \frac{20tan (19.9)}{0.4-tan (19.9)}

The height of the tower is h= \frac{20tan (19.9)}{0.4-tan (19.9)} in terms of the trig function "Tan"

The equation can simply be evaluated to get the answer in figures since the angles are given in the question

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3 years ago
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