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Let’s check out your problem:
Evaluate:
\newline
∑
n
=
2
5
(
−
3
x
−
4
n
)
\sum_{n=2}^{5}(-3 x-4 n)
n
=
2
∑
5
(
−
3
x
−
4
n
)
\newline
Answer:
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Home
Math Problems
Algebra 2
Evaluate rational expressions II
Full solution
Q.
Evaluate:
\newline
∑
n
=
2
5
(
−
3
x
−
4
n
)
\sum_{n=2}^{5}(-3 x-4 n)
n
=
2
∑
5
(
−
3
x
−
4
n
)
\newline
Answer:
Understand the problem:
Understand the problem We need to evaluate the sum of the expression
(
−
3
x
−
4
n
)
(-3x - 4n)
(
−
3
x
−
4
n
)
for each integer value of
n
n
n
from
2
2
2
to
5
5
5
.
Write terms of sum:
Write out the terms of the sum
\newline
The sum is the addition of the expression
(
−
3
x
−
4
n
)
(-3x - 4n)
(
−
3
x
−
4
n
)
evaluated at
n
=
2
n = 2
n
=
2
,
n
=
3
n = 3
n
=
3
,
n
=
4
n = 4
n
=
4
, and
n
=
5
n = 5
n
=
5
.
Evaluate
n
=
2
n=2
n
=
2
:
Evaluate the expression for
n
=
2
n = 2
n
=
2
Substitute
n
=
2
n = 2
n
=
2
into the expression
(
−
3
x
−
4
n
)
(-3x - 4n)
(
−
3
x
−
4
n
)
.
(
−
3
x
−
4
×
2
)
=
(
−
3
x
−
8
)
(-3x - 4\times2) = (-3x - 8)
(
−
3
x
−
4
×
2
)
=
(
−
3
x
−
8
)
Evaluate
n
=
3
n=3
n
=
3
:
Evaluate the expression for
n
=
3
n = 3
n
=
3
Substitute
n
=
3
n = 3
n
=
3
into the expression
(
−
3
x
−
4
n
)
(-3x - 4n)
(
−
3
x
−
4
n
)
.
(
−
3
x
−
4
×
3
)
=
(
−
3
x
−
12
)
(-3x - 4\times3) = (-3x - 12)
(
−
3
x
−
4
×
3
)
=
(
−
3
x
−
12
)
Evaluate
n
=
4
n=4
n
=
4
:
Evaluate the expression for
n
=
4
n = 4
n
=
4
Substitute
n
=
4
n = 4
n
=
4
into the expression
(
−
3
x
−
4
n
)
(-3x - 4n)
(
−
3
x
−
4
n
)
.
(
−
3
x
−
4
×
4
)
=
(
−
3
x
−
16
)
(-3x - 4\times4) = (-3x - 16)
(
−
3
x
−
4
×
4
)
=
(
−
3
x
−
16
)
Evaluate
n
=
5
n=5
n
=
5
:
Evaluate the expression for
n
=
5
n = 5
n
=
5
Substitute
n
=
5
n = 5
n
=
5
into the expression
(
−
3
x
−
4
n
(-3x - 4n
(
−
3
x
−
4
n
).
(
−
3
x
−
4
×
5
(-3x - 4\times5
(
−
3
x
−
4
×
5
= (
−
3
-3
−
3
x -
20
20
20
\))
Add evaluated expressions:
Add the evaluated expressions
\newline
Add the results from steps
3
3
3
to
6
6
6
.
\newline
(
−
3
x
−
8
)
+
(
−
3
x
−
12
)
+
(
−
3
x
−
16
)
+
(
−
3
x
−
20
)
(-3x - 8) + (-3x - 12) + (-3x - 16) + (-3x - 20)
(
−
3
x
−
8
)
+
(
−
3
x
−
12
)
+
(
−
3
x
−
16
)
+
(
−
3
x
−
20
)
Combine like terms:
Combine like terms
\newline
Combine the terms with
x
x
x
and the constant terms separately.
\newline
(
−
3
x
−
3
x
−
3
x
−
3
x
)
+
(
−
8
−
12
−
16
−
20
)
(-3x - 3x - 3x - 3x) + (-8 - 12 - 16 - 20)
(
−
3
x
−
3
x
−
3
x
−
3
x
)
+
(
−
8
−
12
−
16
−
20
)
\newline
(
−
12
x
)
+
(
−
56
)
(-12x) + (-56)
(
−
12
x
)
+
(
−
56
)
Simplify expression:
Simplify the expression Simplify the sum to get the final answer.
−
12
x
−
56
-12x - 56
−
12
x
−
56
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Question
Evaluate the expression for
t
=
−
4.4
t = -4.4
t
=
−
4.4
.
\newline
Write your answer in simplest form.
\newline
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\newline
g
3
g
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3
g
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−
4
g
g
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Simplify. Express your answer as a single fraction in simplest form.
3
2
−
5
p
3
3
\frac{3}{2} - \frac{5p^3}{3}
2
3
−
3
5
p
3
______
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Question
Simplify. Express your answer as a single fraction in simplest form.
\newline
1
+
v
5
w
3
1 + \frac{v^5w}{3}
1
+
3
v
5
w
\newline
______
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Question
Solve for
h
h
h
.
\newline
−
5
h
−
2
=
−
4
h
−
3
\frac{-5}{h - 2} = \frac{-4}{h - 3}
h
−
2
−
5
=
h
−
3
−
4
\newline
There may be
1
1
1
or
2
2
2
solutions.
\newline
h
=
h =
h
=
_____ or
h
=
h =
h
=
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Question
What is the equation of the vertical asymptote of
y
=
1
x
+
9
y = \frac{1}{x + 9}
y
=
x
+
9
1
? _____
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Posted 1 year ago
Question
What is the excluded value for
y
=
1
x
−
9
−
9
y = \frac{1}{x - 9} - 9
y
=
x
−
9
1
−
9
?
\newline
______
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Posted 1 year ago
Question
Simplify. Write your answer using whole numbers and variables.
\newline
9
k
+
4
9
k
2
+
4
k
\frac{9k + 4}{9k^2 + 4k}
9
k
2
+
4
k
9
k
+
4
\newline
______
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Question
Divide. Write your answer in simplest form.
\newline
g
−
1
10
g
3
+
25
g
2
÷
(
g
−
1
)
\frac{g- 1}{10g^3 + 25g^2} \div (g- 1)
10
g
3
+
25
g
2
g
−
1
÷
(
g
−
1
)
\newline
______
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Posted 1 year ago
Question
Simplify. Express your answer as a single fraction in simplest form.
\newline
5
−
3
t
3
1
\frac{5 - \frac{3}{t^3}}{1}
1
5
−
t
3
3
\newline
______
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