Answer:
A negative value or minus sign (-).
Step-by-step explanation:
A grouping symbol can be defined as a set of symbol used for organizing multiple numbers or variables in an algebraic equation.
In Mathematics, there are basically three (3) main grouping symbols and these are;
1. Parentheses ( ).
2. Braces { }.
3. Brackets [ ].
Additionally, grouping symbols are used to determine the order of operation when solving an algebraic equation.
Hence, when distributing a negative sign in front of grouping symbols, you must multiply each term inside the grouping symbols by a negative value or minus sign.
For example, given the algebraic equation X = 20 - 2(-1 + 2 - 5)
We would simplify the numbers in the parentheses (grouping symbol) by multiplying with -2;
X = 20 + 2 - 2 - 10
X = 20 - 10
X = 10
<em><u>Example 2;</u></em>
-(-1 - 2 + 3 - 4)
We multiply each term inside the grouping symbol by the minus sign
1 + 2 - 3 + 4 = 4.
(x-1)(5x-6)
Factor
−
11
-
11
out of
−
11
x
-
11
x
.
5
x
2
−
11
(
x
)
+
6
5
x
2
-
11
(
x
)
+
6
Rewrite
−
11
-
11
as
−
5
-
5
plus
−
6
-
6
5
x
2
+
(
−
5
−
6
)
x
+
6
5
x
2
+
(
-
5
-
6
)
x
+
6
Apply the distributive property.
5
x
2
−
5
x
−
6
x
+
6
Answer:
t
Step-by-step explanation:
Answer:
81
Step-by-step explanation:
the formula for an arithmetic sequence:
aₙ = a₁ + (n-1)d
where aₙ = the nth term
a₁ = the 1st term = -3
n = the term number = 13
d = the common difference = 7
Plugging in those values into the formula to find a₁₃:
a₁₃ = -3 + (13-1)7
= -3 + (12)7
= -3 + 84
= 81
