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3 years ago

Substitution method for 7x-2y=1 & x-2y=1

1 answer:

6 0

We want to use the Substitution method to solve
7x - 2y = 1 (1)
x - 2y = 1 (2)

From equation (1), obtain
2y = 7x - 1 (3)

Substitute (3) into (2).
x - (7x - 1) = 1
-6x + 1 = 1
-6x = 0
x = 0

From (3), obtain
2y = 7*0 - 1 = -1
y = -1/2

Answer: (0, -1/2) or x=0, y= -1/2.

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Answer:

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3 years ago

Perimeter of a rectangle is 11 inches. The length of the rectangle is 1/2 inches what is the width of the rectangle?

Mrrafil [7]

Answer:

Step-by-step explanation:

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3 years ago

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2 years ago

Sara is 5 ft 10 in tall. To the nearest centimeter how tall is Sara? If 1 inch equals 2.54 centimeters

Novay_Z [31]

Answer:

SARA'S height is 22.7 cm

Step-by-step explanation:

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3 years ago

Read 2 more answers

What are the solutions of the quadratic equation 4x^2-8x-12=0

Wewaii [24]

Answer:

Step-by-step explanation:

$4x^2-8x-12=0\\{}\qquad\qquad^{\div4\qquad\div4}\\x^2-2x-3=0\\\\x^2+x-3x-3=0\\\\x(x+1)-3(x+1)=0\\\\(x+1)(x-3)=0\\\\x+1=0\quad\vee\quad x-3=0\\\\x=-1\quad\vee\quad x=3$

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3 years ago