Answer:
3710
Step by step explanation:
Answer:
So the value of the test statistic is -0.85.
Step-by-step explanation:
We know that a sample of 1800 computer chips revealed that 53% of the chips do not fail in the first 1000 hours of their use. The company's promotional literature states that 54% of the chips do not fail in the first 1000 hours of their use.
We get that:
We calculate the standar deviation:
We calculate the value of the test statistic:
So the value of the test statistic is -0.85.
1.
the line of symmetry is x=2, means that the x coordinate of the vertex is x=2.
the point x=2 is the midpoint of the roots
and
.
so
Remark: in the x-axis, if c is the midpoint of a and b, then
2.
since
and
are roots
and
3.
equalizing:
in the left side factorize a, in the left side factorize 8:
in the right side use the difference of squares formula:
simplify by
substitute
with 4:
a=2
Answer: C)2
Answer: m=5x-10
Step-by-step explanation: money spent =5(x-2)
money spent=m
m=5(x-2)
m=5x-10