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2 years ago

SOLVE 5( 2y-1)-2(2-y)+3(2y+9)=0

Mathematics

2 answers:

Nikolay [14]2 years ago

8 0

Answer:

y = -1

Step-by-step explanation:

5(2y−1)−2(2−y)+3(2y+9)=0

Step 1: Simplify both sides of the equation.

5(2y−1)−2(2−y)+3(2y+9)=0

(5)(2y)+(5)(−1)+(−2)(2)+(−2)(−y)+(3)(2y)+(3)(9)=0(Distribute)

10y+−5+−4+2y+6y+27=0

(10y+2y+6y)+(−5+−4+27)=0(Combine Like Terms)

18y+18=0

Step 2: Subtract 18 from both sides.

18y+18−18=0−18

18y=−18

Step 3: Divide both sides by 18.

18y/18 = -18/18

Answer: y=−1

USPshnik [31]2 years ago

5 0

Open bracket
10y-5-4+2y+6y+27=0
Add up all y values and numbers
18y+18=0
Take y values to the opposite side
18y=-18
y=-1

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Step-by-step explanation:

Step 1:

64 : 8 Ratio

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2 years ago

Two ropes are attached to a large ballon in a parade. The people holding the ropes are 40 feet apart,and the angle between the t

qaws [65]

Ropes are 9.63 meters ans 8.178 meters.

<u>Step-by-step explanation:</u>

Step 1 :

List all the given things

Distance between people holding ropes = 40 =(40*0.3048) meters = 12.192 meters

Angle between two ropes = 86 degrees

Angle of elevation of one rope = 42 degrees

Step 2 :

Two angles of triangle are already given so third angle can be calculated as -

Third angle = 180 - ( 86 + 42 ) = 52 degrees

Step 3 :

As we know all three angles we will apply sine rule now, which is

$\frac{a}{sine A} = \frac{b}{sine B} = \frac{c}{sine C}$

Step 4 :

By putting values, we have

$\frac{a}{sine 52} = \frac{b}{sine 42} = \frac{12.192}{sine 86}$

Step 5 : Calculating a and b

$a = 12.192 * \frac{sine 52}{sine 86}$ , $b = 12.192 * \frac{sine 42}{sine 86}$

Step 6 :

By putting values of all sine and calculating we get,

a = 9.63 meters and b = 8.178 meters

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