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AleksandrR [38]
3 years ago
9

Find the possible value or values of y in the quadratic equation z^2 - 4z+ 4 =0

Mathematics
1 answer:
jeyben [28]3 years ago
5 0
Didn't you mean "Find the possible value or values of z?  y is not at all present in this equation.

z^2 - 4z + 4 = 0 can be factored into (z-2)(z-2).  Thus, the given equation has two equal, real solutions:  z=2 and z=-2.
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The perimeter of an isosceles triangle is 65 centimeters. Find the length of the two equal sides when each is 10 centimeters lon
natita [175]

Answer: the length of each of the two equal sides is 25 centimeters

Step-by-step explanation:

Let x represent the length of each of the two equal sides. This means that the total length of the two longer sides is 2x.

Let y represent the length of the third side.

The perimeter of a triangle is expressed as the sum of the length of each side of the triangle. The perimeter of the isosceles triangle is 65 centimeters. It means that

2x + y = 65 - - - - - - - - - 1

Each of the equal sides is 10 centimeters longer than the third side. This means that

x = y + 10

Substituting x = y + 10 into equation 1, it becomes

2(y + 10) + y = 65

2y + 20 + y = 65

2y + y = 65 - 20

3y = 45

y = 45/3 = 15

Substituting y = 15 into x = y + 10, it becomes

x = 15 + 10 = 25

5 0
3 years ago
QUESTION #1 - Probability
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Answer:

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Step-by-step explanation:

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7 0
2 years ago
Solve for q.<br><br> 20 − 3q = 5q − 20
galina1969 [7]

Answer:

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Step-by-step explanation:

40 - 3q = 5q

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7 0
3 years ago
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Step-by-step explanation:

6 0
3 years ago
A while back, either james borrowed $12 from his friend rita or she borrowed $12 from him, but he can’t quite remember which. ei
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8 0
3 years ago
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