Answer:
Yes, it can, because -4.5 lies to the left of -3.5
Step-by-step explanation:
we know that
The solution of the inequality is equal to the interval------> (-∞,-3.5)
All real numbers less than -3.5
x<-3.5
Substitute in the inequality
-4.5<-3.5 ------> is true
therefore
The number -4.5 is a value in the shaded region, because lies to the left of -3.5
Answer:
b
Step-by-step explanation:
Is this what you wanted?
Step-by-step explanation:
First, say that
x
4
=
u
.
The equation then can be written as
u
2
−
10
u
+
9
=
0
This more likely looks familiar.
This can be factored into
(
u
−
9
)
(
u
−
1
)
=
0
From here it can be said that if the product of two terms is
0
, at least one of the terms must be equal to
0
, so set both terms equal to
0
to find when this is true.
u
−
9
=
0
u
−
1
=
0
Which can be rewritten as
u
=
9
u
=
1
Now, go back to the beginning when we said that
x
4
=
u
. Replace each instance of
u
with
x
4
.
x
4
=
9
x
4
=
1
Solve each.
x
4
=
3
2
x
=
±
(
3
2
)
1
4
x
=
±
(
3
)
1
2
x
=
±
√
3
x
4
=
1
x
=
±
1
When in doubt, check a graph:
graph{x^8-10x^4+9 [-13.64, 14.84, -2.16, 12.08]}
The zeros (solutions) are at
x
=
±
1
,
±
√
3
.
3/5x+19-3/20x-7
First convert the fractions so they have a common denominator and rearrange
12/20x-3/20x+19-7
<em><u>9/20x+12</u></em>
Use the simultaneous equation method. y = 11 and x = 4<span />
