No it is not always a mixed number if you add two mixed numbers
Answer:
54 cookies
Step-by-step explanation:
seven dozen means 7 * 12 cookies
because one dozen = 12 cookies, so having seven dozen means have seven, one dozen batches
seven dozen = 7*12 = 84 cookies
she already made 138
138 - 84 cookies = 54 cookies left to go
54 cookies
x
=
−
7
or
x
=
−
8
Explanation:
Find a pair of factors of
56
with sum
15
.
The pair
7
,
8
works in that
7
⋅
8
=
56
and
7
+
8
=
15
Hence:
0
=
x
2
+
15
x
+
56
=
(
x
+
7
)
(
x
+
8
)
So:
x
=
−
7
or
x
=
−
8
Alternative method
Answer:corona
Step-by-step explanation: