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Anna [14]
3 years ago
10

Which equation is equivalent to 5 - 2x = 4?

Mathematics
2 answers:
expeople1 [14]3 years ago
5 0
-2x = -1
x = 1/2
Any equation that returns x=1/2 is a solution to this problem. For example, x= (3•4)/6 can be simplified so that x=1/2
Tanya [424]3 years ago
4 0

Hey there!

  • \bold{Simplify} both sides of your equation
  • \bold{-2x+5=4}
  • \bold{Subtract}  by the number \bold{5}
  • \bold{Like\downarrow}
  • \bold{-2x+5-5=4-5}
  • \bold{Cancel\rightarrow5-5} because it equals \bold{Keep\rightarrow4-5}   because it helps us solve for our answer
  • \bold{4-5=-1}
  • \bold{We\ get:-2x=-1}
  • \bold{Divide} by the \bold{-2} on each of your sides
  • \bold{Like\downarrow}
  • \bold{\frac{-2x}{-2}=\frac{-1}{-2}}
  • \bold{Cancel\rightarrow\frac{-2x}{-2}} because it gives us the result of \bold{Keep\rightarrow\frac{-1}{-2}} because it gives us the answer
  • \boxed{\boxed{\bold{Answer:x=\frac{1}{2}}}}\checkmark

Good luck on your assignment and enjoy your day!

~\frak{LoveYourselfFirst:)}

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Is the real number √1.21 rational or irrational?<br> A) Rational<br> B) Irrational
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A circle of radius 10cm had a hole cut out of its centre to form a ring. Find the radius of the hole if the remaining area is 50
valentina_108 [34]

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7.07cm

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What is the length of line segment RS? Use the law of sines to find the answer. Round to the nearest tenth. Law of sines:
Leno4ka [110]

Answer:

Correct Answer is B. 2.4 Units

Step-by-step explanation:

The missing picture in question is attached.

The Law of Sines is given as:

\frac{Sin(A)}{a} = \frac{Sin (B)}{b} = \frac{Sin (C)}{c}

Where,

a,b,c are the length of sides of triangle

A,B,C are the angles between the two sides of triangle

According to the picture attached, we have ΔRQS,

Let,

r = 3.1 units

R = 80°

s = 2.4 units

S = S

q = RS

Q = Q

Using law of Sines:

\frac{Sin (R)}{r} = \frac{Sin (S)}{s}\\ \frac{Sin (80)}{3.1} = \frac{Sin (S)}{2.4} \\Sin (S) = \frac{Sin (80)}{3.1} * 2.4\\Sin (S) = 0.762\\S = Sin^{-1} (0.762) \\S = 49.68°

Since, triangle is constitute of total 180°, hence,

∠Q + ∠R + ∠S = 180°

∠Q + 80 + 49.68 = 180

∠Q = 180 - 80 - 49.68

∠Q = 50.32°

To find line segment RS, again use law of sines:\frac{Sin (R)}{r} = \frac{Sin (Q)}{q}\\\frac{Sin (80)}{3.1} = \frac{Sin (50.32)}{RS}\\0.3177 = \frac{0.77}{RS}\\RS = 2.42 Units

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