Answer:
There is a mistake in Step 2. Maya distributed 3(x-10) as 3x+30, which is false. The correct step is: 6x+12 = 3x-30
Then solve for x
The answer is B. Maya made a mistake between Step 1 and Step 2 because she did not correctly distribute 3 to (x-10).
The answer is is 24 5 +9=15+9=24
Solution:
we have given the length of the rectangular card-

and, width-

now, the area of the card will be- length×width.
so, we have-

we also have given the length of ribbon-

and, width-

so, area of the ribbon is-
length×width

now the area of shaded gray region will be-

Hence, the required expression would the above expression.
Answer:
The cooperative has to make 70 shirts per day.
Step-by-step explanation:
Let x shirts be the number of shirts in a day the cooperative has to make to fulfill his plan.
In 8 days, it will make 8x shirts.
Everyday, overfilling the norm by 10 shirts, the cooperative makes x + 10 shirts in a day.
The cooperative fulfilled his plan in 1 day less, so it spent
days and made
shirts.
The number of shirts is the same, so

The cooperative has to make 70 shirts per day.