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BartSMP [9]
2 years ago
14

(Please Hurry!) Which expression is equivalent to the following complex fraction?

Mathematics
1 answer:
galben [10]2 years ago
6 0

Answer:

The expression equivalent to the given complex fraction is

\frac{-2x+5y}{3x-2y}

Step-by-step explanation:

An easy way to solve the complex fraction is to solve the numerator and denominator separately.

Numerator:

\frac{-2}{x} + \frac{5}{y}\\ = \frac{-2y + 5x}{xy}

Denominator:

\frac{3}{y} + \frac{-2}{x}\\ = \frac{3x - 2y}{xy}

Solving the complex fraction:

[\frac{-2}{x} + \frac{5}{y}] / [\frac{3}{y} + \frac{-2}{x}]\\= [\frac{-2y + 5x}{xy}] / [\frac{3x - 2y}{xy}]

=\frac{-2y + 5x}{xy} * \frac{xy}{3x - 2y}

Common terms in the numerator and denominator cancels each other(Cross multiplication) :

= \frac{-2y + 5x}{3x - 2y}

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9 plus 14 plus 18 plus 9 is 50
8 0
2 years ago
Find a rational number halfway between 7/8 and 6/7
algol [13]
<h3>Answer: 97/112</h3>

================================================

How to get this answer:

Midpoint formula: (A+B)/2 = C

A and B are the endpoints with C as the midpoint

A = 7/8

B = 6/7

A+B = 7/8 + 6/7

A+B = 49/56 + 48/56

A+B = (49+48)/56

A+B = 97/56

(A+B)/2 = (97/56) divided by 2

(A+B)/2 = (97/56) times (1/2)

(A+B)/2 = (97*1)/(56*2)

(A+B)/2 = 97/112

8 0
2 years ago
Supervisor: "You did a great job last month. You made $75.00 an hour with your commission pay.” Employee: "This month I want to
nasty-shy [4]
I'd say you make 90$ an hour.

   $75.00 + (20% x 75)

Rewritten 20% as .2 

 75 + ( .2 x 75 )
 
75 + 15 =

  90



 OR

75 x 1.2

  
4 0
2 years ago
A tourist looks out from the observation deck of the Space Needle in Seattle. The deck is at a height of 520 ft. She sees her fr
WARRIOR [948]

Answer:

Last option 527.7 ft

Step-by-step explanation:

From the diagram attached we can see the angle of depression is 80.2 which is equal to ∠ACB (alternate angles)

Height of the deck AB = 520 ft. and we have to calculate the distance H between the tourist and her friend.

Sin ∠ACB = \frac{AB}{AC}

Now we apply sin rule sin 80.2 = \frac{520}{H}

.9854=\frac{520}{H}

H = \frac{520}{.9854} = 570 ft

So the tourist and her friend are 527.7 ft apart.

6 0
2 years ago
A rectangular lot is 275 feet deep, and it contains 2\3 of an acre. what is the length of the lot
Mazyrski [523]

Answer:

The length of the lot is 105.6\ ft

Step-by-step explanation:

Remember that

1\ acre=43,560\ ft^{2}

In this problem the area of the lot  is equal to

\frac{2}{3} (43,560)=29,040\ ft^{2}

Let

x-----> the length of the lot

y ----> the deep of the lot

The area of the lot is

A=xy

we have

A=29,040\ ft^{2}

y=275\ ft

substitute and solve for x

29,040=x(275)

x=29,040/(275)=105.6\ ft

3 0
2 years ago
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