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hichkok12 [17]
2 years ago
5

Explain how to find the value of z if you know that 100x*2 + 120x + z is a perfect square trinomial

Mathematics
2 answers:
maksim [4K]2 years ago
8 0
For perfect trinomial, determinant is zero.
Comparing given equation with general quadratic equation ax²+bx+c,

a=100, b=120, c=z
Δ=b²-4ac = 0
120²-4(100)(z) = 0
z=120²/4(100) = 36

Therefore, the required trinomial is,
100x²+120x+36
wariber [46]2 years ago
7 0
Divide the value of "b" by 2 and then square it.

   (b / 2)²
= (120 / 2)²
= (60)²
= 3600

Therefore the value of z is 3600. That's at least what I believe lol
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Answer:

The answer to your question is 43.8 mL of acid.

Step-by-step explanation:

Data

Total volume = 362 ml

12.1 % is acid

The Volume of acid = ?

Process

1.- Use the rule of three and cross multiplication to solve this problem.

               362 ml ------------------- 100%

                    x       -------------------  12.1 %

                    x = (12.1 x 362) / 100

                    x = 4380.2 / 100

                    x = 43.802 ml

2.- Round your answer to the nearest tenth.

                        43.802   only consider the first decimal

                        43.8 mL

3.- Conclusion

    A 12.1% solution of acid has 43.8 mL of acid.

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3 years ago
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Answer:

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Step-by-step explanation:

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1 milion British_pennies are 

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