3 years ago

How much mass does water contains?

1 answer:

7 0

<span>One cup of water weighs approximately 8 ounces, which is equal to 225 grams. One cup holds 225 milliliters of water. The volume and weight of 1 cup of water are the same number under the metric system because the density of water is 1 gram per milliliter.</span>

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Evaluate the discriminant of the equation. Tell how many solutions each equation has and whether the solutions are real or imagi

cupoosta [38]

Answer:

D=-4<0, the equation has no real solutions, it has two imaginary solutions.

Step-by-step explanation:

The quadratic equation $x^2 +4x+5=0$ has coefficients

a=1,

b=4,

c=5.

The discriminant D is the expression

$D=b^2-4ac.$

Hence,

$D=4^2-4\cdot 1\cdot 5=16-20=-4$

Since the discriminant is negative, the equation has no real solutions, it has two imaginary solutions.

4 0

3 years ago

Read 2 more answers

Use substitution to write an equivalent quadratic equation.<br> (3x + 2)2 + 7(3x + 2) – 8 = 0

ANEK [815]

Let z = 3x+2. Then, by substitution, your equation is
.. z^2 +7z -8 = 0

_____
This equation can be factored as
.. (z +8)(z -1) = 0
.. x = -8 or +1
Then
.. 3x +2 = -8 or +1
.. 3x = -10 or -1
.. x = -10/3 or -1/3