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babymother [125]
3 years ago
12

Please help me with this problem​

Mathematics
1 answer:
Rom4ik [11]3 years ago
6 0

y=x^2 + x - 2

x + y = 1

Replace y in the second equation:

x + x^2 + x -2 = 1

Simplify:

x^2 + 2x -2 = 1

Subtract 1 from both sides:

x^2 + 2x -3 = 0

Factor:

(x-1) (x+3) = 0

Solve for both x's:

x = 1 and x = -3

Now replace x in the second equation and solve for y using both x values:

1 + y = 1, y = 0

-3 + y = 1, y = 4

Now you have (1,0) and (-3,4) as solutions for (x,y)

XY = x times y:

1 x 0 = 0

-3 x 4 = -12

The answer would be -12

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What is (4c-d+0.2)^2-10c; c=3.1, d=4.6​
yuradex [85]

Good evening ,

______

Answer:

(4c-d+0.2)² - 10c = 33

___________________

Step-by-step explanation:

(4c-d+0.2)^2-10c

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(4(3.1) - 4.6 + 0.2)² - 10(3.1) = (12.4 - 4.6 + 0.2)² - 31 = (7.8 + 0.2)² -31 = 8² - 31 = 64-31 =33.

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3 years ago
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1 year ago
How do you turn 139,000,000 into a fraction
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. The perimeter of a rectangle is 38 inches. If the length is 3 inches more than the width, find the width.
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