How do you write 0.000003939 in scientific notation?
1 answer:
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Answer:
y + 20 = 9(x + 2)
Step-by-step explanation:
The equation of a line in point- slope form is
y - b = m(x - a)
where m is the slope and (a, b) a point on the line
Calculate m using the slope formula
m = (y₂ - y₁ ) / (x₂ - x₁ )
with (x₁, y₁ ) = (- 2, - 20) and (x₂, y₂ ) = (9, 79)
m = =
= 9
Using (a, b) = (- 2, - 20), then
y - (- 20) = 9(x - (- 2)), that is
y + 20 = 9(x + 2)
Answer:
1) b
2) c
Step-by-step explanation:
1)
a can be either 5 or -5, because the absolute value of those is both 5. Therefore, the correct answer for this is b.
2)
Since the absolute value function will always return a positive value, this equation must have no solutions, or choice C. Hope this helps!
Given:
One of the two roots of the given equation is double the additive inverse of the other.
To find:
The value of k.
Solution:
Let two roots of the given equation are and
.
According to the question,
(Additive inverse of
is
)
If and
are roots of the quadratic equation
then
We have,
Here, a =1, b=k and c=-98.
...(i)
Now,
Divide both sides by -2.
Taking square root on both sides.
Using (i), we get
Therefore, the value of k is either -1 or 1.