We know that Step 1 is correct, because it is just a restatement of the equation. Therefore, we can eliminate Step 1:
2(5y – 2) = 12 + 6y
In Step 2, the student tried using the Distributive Property. The Distributive Property can be written as one of the two following formulas:
a(b + c) = ab + ac
a(b – c) = ab – ac
In this case, we'll use the second formula. Substitute any known values into the equation above and simplify:
2(5y – 2) = 2(5y) – 2(2)
2(5y – 2) = 10y – 4
In Step 2, the student calculated 2(5y – 2) to equal 7y – 4. However, we have just proven that 2(5y – 2) is equal to 10y – 4.
The student first made an error in Step 2, and the correct step is:
Step 2: 10y – 4 = 12 + 6y
I hope this helps!
Answer: D).-20
Step-by-step explanation:
<span>a(n-5)+6=bn
use dis. property for left
an-a5+6=bn
isolate n.
(an-a5+6)/ b= n is the asnwer</span>
Answer:
Slope: 6
Y-intercept: 0
Proportional
Step-by-step explanation:
The equation for this table is y = 6x + 0 or just y = 6x.
y = 6x + 0
y-value slope (x-value) y-intercept
Proportional because it crosses (0,0) on the graph.
Answer:
2
Step-by-step explanation:
x/6 = 3/9
cross multiply
9x = 18
divide 9 on both sides
x= 2
