Answer:
3(x+y)
=3x+3y
Here he have to multiply 3 with x and y.
Answer:
(a) Increased by 100%
(b) Increased by 50%
(c) Decreased by 33.33%
(d) Decreased by 50%
(e) Increased by 200%
(f) Decreased by 66.67%
Step-by-step explanation:
In this question, we can use the following <em>formula</em>:

Positive value of percentage change means increase and
Negative value of percentage change means decrease.
Solution a)
Old Value = 1
New Value = 2
Increase of 100%
Solution b)
Old Value = 2
New Value = 3

Increase of 50%.
Solution c)
Old Value = 3
New Value = 2

Decrease of 33.33%.
Solution d)
Old Value = 2
New Value = 1

Decrease of 50%.
Solution e)
Old Value = 1
New Value = 3

Increase of 200%.
Solution f)
Old Value = 3
New Value = 1

Decrease of 66.67%.
So, the answer is:
(a) Increased by 100%
(b) Increased by 50%
(c) Decreased by 33.33%
(d) Decreased by 50%
(e) Increased by 200%
(f) Decreased by 66.67%
Answer:
1+12
Step-by-step explanation:
can be expressed as
1+12
=13
If it has a single zero that means it has to be just touching the x-axis with its tip.
We know that if it has only one zero, the discriminant equals 0.
So,

Solving for k,
.
Hope this helps.
X equals 3. Because you divide 36 by 12