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Let’s check out your problem:
Solve for
x
x
x
.
\newline
(x - 5)(x - 6) > 0
\newline
Write a compound inequality like 1 < x < 3 or like x < 1 or x > 3.
View step-by-step help
Home
Math Problems
Algebra 2
Solve quadratic inequalities
Full solution
Q.
Solve for
x
x
x
.
\newline
(
x
−
5
)
(
x
−
6
)
>
0
(x - 5)(x - 6) > 0
(
x
−
5
)
(
x
−
6
)
>
0
\newline
Write a compound inequality like
1
<
x
<
3
1 < x < 3
1
<
x
<
3
or like
x
<
1
x < 1
x
<
1
or
x
>
3
x > 3
x
>
3
.
Divide Intervals:
Divide the number line into intervals using the critical points.
\newline
Intervals:
(
−
∞
,
5
)
(-\infty, 5)
(
−
∞
,
5
)
,
(
5
,
6
)
(5, 6)
(
5
,
6
)
,
(
6
,
∞
)
(6, \infty)
(
6
,
∞
)
.
Test Interval
(
−
∞
,
5
)
(-\infty, 5)
(
−
∞
,
5
)
:
Test the interval
(
−
∞
,
5
)
(-\infty, 5)
(
−
∞
,
5
)
to determine the sign of
(
x
−
5
)
(
x
−
6
)
(x - 5)(x - 6)
(
x
−
5
)
(
x
−
6
)
. Let
x
=
4
x = 4
x
=
4
, then
(
4
−
5
)
(
4
−
6
)
=
(
−
1
)
(
−
2
)
=
2
(4 - 5)(4 - 6) = (-1)(-2) = 2
(
4
−
5
)
(
4
−
6
)
=
(
−
1
)
(
−
2
)
=
2
, which is positive.
Test Interval
(
5
,
6
)
(5, 6)
(
5
,
6
)
:
Test the interval
(
5
,
6
)
(5, 6)
(
5
,
6
)
to determine the sign of
(
x
−
5
)
(
x
−
6
)
(x - 5)(x - 6)
(
x
−
5
)
(
x
−
6
)
. Let
x
=
5.5
x = 5.5
x
=
5.5
, then
(
5.5
−
5
)
(
5.5
−
6
)
=
(
0.5
)
(
−
0.5
)
=
−
0.25
(5.5 - 5)(5.5 - 6) = (0.5)(-0.5) = -0.25
(
5.5
−
5
)
(
5.5
−
6
)
=
(
0.5
)
(
−
0.5
)
=
−
0.25
, which is negative.
Test Interval
6
,
∞
)
:
<
/
b
>
T
e
s
t
t
h
e
i
n
t
e
r
v
a
l
$
6
,
∞
)
t
o
d
e
t
e
r
m
i
n
e
t
h
e
s
i
g
n
o
f
$
x
−
5
)
(
x
−
6
)
.
L
e
t
$
x
=
7
6, \infty):</b> Test the interval \$6, \infty) to determine the sign of \$x - 5)(x - 6). Let \$x = 7
6
,
∞
)
:<
/
b
>
T
es
tt
h
e
in
t
er
v
a
l
$6
,
∞
)
t
o
d
e
t
er
min
e
t
h
es
i
g
n
o
f
$
x
−
5
)
(
x
−
6
)
.
L
e
t
$
x
=
7
, then
7
−
5
)
(
7
−
6
)
=
(
2
)
(
1
)
=
2
7 - 5)(7 - 6) = (2)(1) = 2
7
−
5
)
(
7
−
6
)
=
(
2
)
(
1
)
=
2
, which is positive.
Final Solution:
Since we want (x - 5)(x - 6) > 0, we take the intervals where the expression is positive.
\newline
The solution is x < 5 or x > 6.
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\newline
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7
x
+
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<
x
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7x+1 < x+9
7
x
+
1
<
x
+
9
\newline
Which of the following best describes the solutions to the inequality shown?
\newline
Choose
1
1
1
answer:
\newline
(A)
x
>
4
3
x > \frac{4}{3}
x
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3
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\newline
(B)
x
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3
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x
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\newline
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x
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x
<
1
\newline
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x
<
5
3
x < \frac{5}{3}
x
<
3
5
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Question
52
−
3
x
<
−
14
52-3x < -14
52
−
3
x
<
−
14
\newline
Which of the following best describes the solutions to the inequality shown?
\newline
Choose
1
1
1
answer:
\newline
(A)
x
>
−
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3
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x
>
−
3
38
\newline
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\newline
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\newline
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\newline
Which of the following best describes the solutions to the inequality shown?
\newline
Choose
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1
1
answer:
\newline
(A)
x
<
7
5
x < \frac{7}{5}
x
<
5
7
\newline
(B)
x
<
3
x < 3
x
<
3
\newline
(C)
x
<
3
5
x < \frac{3}{5}
x
<
5
3
\newline
(D)
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>
3
5
x > \frac{3}{5}
x
>
5
3
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Question
Rani is a real estate agent. For each house she sells, she pays
$
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1.8
%
1.8 \%
1.8%
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$
4
,
580
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$4
,
580
. If
p
p
p
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\newline
Choose
1
1
1
answer:
\newline
(A)
0.018
p
−
100
=
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0.018 p-100=4580
0.018
p
−
100
=
4580
\newline
(B)
0.018
p
+
100
=
4580
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p
+
100
=
4580
\newline
(C)
(
100
−
0.018
)
p
=
4580
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(
100
−
0.018
)
p
=
4580
\newline
(D)
(
100
+
0.018
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p
=
4580
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(
100
+
0.018
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p
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4580
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Posted 1 year ago
Question
A commercial airplane that is
1
1
1
,
500
500
500
miles into a
2
2
2
,
500
500
500
-mile journey is traveling at
450
450
450
knots in still air when it picks up a tailwind of
150
150
150
knots (in the same direction). If
h
h
h
is the number of hours remaining in the airplane's flight, which of the following equations best describes the situation?
\newline
1
1
1
k
n
o
t
=
1.15
\mathrm{knot}=1.15
knot
=
1.15
miles per hour (mph)
\newline
Choose
1
1
1
answer:
\newline
(A)
1
,
500
+
690
h
=
2
,
500
1,500+690 h=2,500
1
,
500
+
690
h
=
2
,
500
\newline
(B)
1
,
500
+
600
h
=
2
,
500
1,500+600 h=2,500
1
,
500
+
600
h
=
2
,
500
\newline
(C)
1
,
500
−
600
h
=
2
,
500
1,500-600 h=2,500
1
,
500
−
600
h
=
2
,
500
\newline
(D)
1
,
500
−
690
h
=
2
,
500
1,500-690 h=2,500
1
,
500
−
690
h
=
2
,
500
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Question
A weeping willow that is
15
15
15
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35
35
35
feet in
y
y
y
years at a constant rate of
24
24
24
inches per year. Which of the following equations best describes this situation?
\newline
1
1
1
foot
=
12
=12
=
12
inches
\newline
Choose
1
1
1
answer:
\newline
(A)
35
=
15
+
2
y
35=15+2 y
35
=
15
+
2
y
\newline
(B)
35
=
15
+
24
y
35=15+24 y
35
=
15
+
24
y
\newline
(C)
35
=
15
−
2
y
35=15-2 y
35
=
15
−
2
y
\newline
(D)
35
=
15
−
24
y
35=15-24 y
35
=
15
−
24
y
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Question
The gas mileage for a car is
23
23
23
miles per gallon when the car travels at
60
60
60
miles per hour. The car begins a trip with
13
13
13
gallons in its tank, travels at an average speed of
60
60
60
miles per hour for
h
h
h
hours, and ends the trip with
10
10
10
gallons in its tank. Which of the following equations best models this situation?
\newline
Choose
1
1
1
answer:
\newline
(A)
13
−
23
h
60
=
10
13-\frac{23 h}{60}=10
13
−
60
23
h
=
10
\newline
(B)
13
−
60
h
23
=
10
13-\frac{60 h}{23}=10
13
−
23
60
h
=
10
\newline
(C)
13
−
60
h
23
=
10
\frac{13-60 h}{23}=10
23
13
−
60
h
=
10
\newline
(D)
13
−
23
h
60
=
10
\frac{13-23 h}{60}=10
60
13
−
23
h
=
10
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Posted 1 year ago
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