Answer:
2.(b) w= 3
3. x= -3 or x= 3
Step-by-step explanation:
2.(b) <u>Method 1:</u>
Simplify:
×5 on both sides:
Expand:
Bring constants to 1 side, w terms to the other:
Simplify:
Divide both sides by 3:
<u>Method 2:</u>
Multiply by 5 throughout:
Expand:
Simplify:
+9 on both sides:
-4w on both sides:
Simplify:
Divide by 3 on both sides:
3.
Multiply by 3x on both sides:
Expand:
Simplify:
Divide by 6 on both sides:
-9 on both sides:
Factorise:
*Since a²-b²= (a +b)(a -b),
Thus,
x +3= 0 or x -3= 0
x= -3 or x= 3
Answer:
Step-by-step explanation:
For this you just find the average of the 3 numbers
To find the average you add all of the numbers together and divide by the number of numbers
4+1+9
=14
14/3
=4 and 2/3
Since you can't have 2/3 of a cow, round up
5 cows (on average)
Answer:
12 and 4
Step-by-step explanation:
12 / 3 = 4
12 + 4 = 16
Hope this helps!
Answer:
13x + 12xy - 3x
Step-by-step explanation:
x(13 + 12y - 3)
You want to distribute the x across each term in the parentheses.
x • 13 = 13x
x • 12y = 12xy
x • -3 = -3x
Combine terms.
13x + 12xy - 3x
Hope this helps!
Answer:
C:16
Step-by-step explanation:
Hopefully this helps!