Answer = $39.78
100-20 =80
100-25=75
Multiply 60 x .80 to get $48
Then multiply 48 x .75 to get $36
Sales tax %10.5 = move decimal two places to left .105
Now multiply 36 x .105 =3.78
$3.78 equals your sales tax
Finally add $3.78+$36= $39.78
Answer:
144 days
Step-by-step explanation:
160 · 0.9
6a² + 7ax - 3x²
6a² + 9ax - 2ax - 3x²
3a(2a) + 3a(3x) - x(2a) - x(3x)
3a(2a + 3x) - x(2a + 3x)
(3a - x)(2a + 3x)
Answer:
(a) The graphic representation is in the attached figure.
(b)
.
(c)
.
Step-by-step explanation:
(a) Given a complex number
we know, from Euler's formula that
. So, it is not difficult to notice that

so it is on the unit circumference. Also, notice that the Cartesian representation of the complex number is
.
Now,
.
Notice that
has the same modulus that
, so it is on the unit circumference. Beside, its Cartesian representation is
.
So, the points
and
are symmetric with respect to the X-axis. All this can be checked in the attached figure.
(b) Notice that

Then,
.
(c) Notice that

Then,
.