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Scilla [17]
3 years ago
11

Twice the sum of -2 and a number is the same as the number decreased by 5/2.The equation is

Mathematics
1 answer:
Juliette [100K]3 years ago
8 0
The equation is 2(x-2) = x - 5/2
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Answer:

Step-by-step explanation:

if center=(h,k)

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The sail of a boat is in the shape of a right triangle, as shown below:
dolphi86 [110]
Answer: Choice C
7 divided by cosec 50 degrees

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

Explanation:

Abbreviations:
sec = secant
cot = cotangent
cosec = cosecant (csc is also a widely used abbreviation)

-----------------

Let the horizontal leg be x

This leg is opposite the angle 50 degrees. The hypotenuse is 7

Opposite = x
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We'll either use the sine rule or the cosecant (csc) rule
sine = opposite/hypotenuse
cosecant = hypotenuse/opposite

Since "sine" is nowhere to be found in the answer choices, we'll use the cosecant rule

-----------

cosecant = hypotenuse/opposite
csc(angle) = hypotenuse/opposite
csc(50) = 7/x
x*csc(50) = 7
x = 7/csc(50)

This is why the answer is choice C

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Answer:

You need to solve for one variable in each equation and the substitute that in for the second equation.

Step-by-step explanation:

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