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Nookie1986 [14]

3 years ago

7

Solve the system of equations by substitution. Write your solution as an ordered pair

2 answers:

sergejj [24]3 years ago

8 0

Solving it by substitution is:

4(3y-20)+8y=20: substitute the second equation into the first equation (hence the name solving by substitution)
12y-80+8y=20: distribute 4 to 3y and 4 to 20
20y-80=20: combine like terms (12y+8y)
20y=100: add 80 to 20
y=5: divide 100 by 20 and you get 5

:)

marshall27 [118]3 years ago

5 0

Answer: (-5,5)

Step-by-step explanation:

graphing the two equations on a calculator gets the point (-5,5)

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lakkis [162]

Answer:

The given point A (6,13) lies on the equation. True

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Step-by-step explanation:

Here, the given equation is : $y =\frac{4}{3} x + 5$

Now,check the given equation for the given points.

1) A (6,13)

Substitute x = 6 in the given equation $y =\frac{4}{3} x + 5$

$y =\frac{4}{3} (6) + 5 = 4(2) + 5 = 8 + 5 = 13$

⇒ y= 13

Hence, the given point A (6,13) lies on the equation.

2) B (21,33)

Substitute x = 21 in the given equation $y =\frac{4}{3} x + 5$

$y =\frac{4}{3} (21) + 5 = 4(7) + 5 = 28 + 5 = 33$

⇒ y = 33

Hence, the given point B(21,33) lies on the equation.

3) C (99, 137)

Substitute x = 99 in the given equation $y =\frac{4}{3} x + 5$

$y =\frac{4}{3} (99) + 5 = 4(33) + 5 = 132 + 5 = 137$

⇒ y = 137

Hence, the given point C (99, 137) lies on the equation.

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3 years ago

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Nutka1998 [239]

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A jacket usually sells for $69.00. If the jacket is 30% off, and sales tax is 8%, what is the total price of the jacket, includi

Ivan

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vova2212 [387]

Answer:

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Step-by-step explanation:

<h3>Area of a parallelogram = Base*Height</h3>

Here,

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→ 6*4ft

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<h3 /><h3>While writing area of a figure, we have to express the area in sq which means square</h3>

<h2> <em>ThankYou</em></h2>

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Answer:

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Step-by-step explanation:

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