Simplify the expression:
(–5r − 2)(4)
Answers
Answered by
3
Step-by-step explanation:
Explanation:
We have:
(
p
5
r
2
)
4
(
−
7
p
3
r
4
)
2
(
6
p
r
3
)
.
So,
(
p
5
r
2
)
4
=
(
p
20
r
8
)
,
(
−
7
p
3
r
4
)
2
=
(
−
7
2
p
6
r
8
)
,
and
(
6
p
r
3
)
.
Let's put the expression back together:
(
p
20
r
8
)
(
−
7
)
2
(
p
6
r
8
)
(
6
p
r
3
)
.
Since everything is being multiplied, we can separate the factors and the constants and collect similar ones together:
p
20
r
8
(
−
7
)
2
(
p
6
r
8
(
6
)
p
r
3
=
.
(
p
20
p
6
p
)
(
r
8
r
8
r
3
)
(
−
7
)
2
(
6
)
.
When you multiply numbers raised to an exponent and the bases are the same, you add the exponents . So:
(
p
20
p
6
p
)
=
p
27
,
(
r
8
r
8
r
3
)
=
r
19
and
(
−
7
)
2
(
6
)
=
49
⋅
6
=
294
.
Looks like we have
294
p
27
r
19
.
Go through all these steps yourself, writing them down as you go, and check my arithmetic,
Answered by
0
Answer:
(-5r-2)(4)=0
-20r-8=0
r=8+20
r=28
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