So the number of pencils bought can be represented by an equation:

, where n is the number of notebooks bought. Since Helen bought 5 notebooks, simply plug 5 into n:

. So Helen bought 12 pencils.
Answer:
25
Step-by-step explanation:
Answer:
Each person shared 1/6 of the cake.
Step-by-step explanation:
3 people shared a half of a cake so it’s 1/2 divided by 3.
Answer:

Step-by-step explanation:
Q3.
If ΔGHI and ΔJKL are similar, then the sides are in proportion:

We have
JL = x, GI = 9 ft, LK = 24 ft, IH = 12 ft.
Substitute:

<em> multiply both sides by 2</em>

Q4.
We must multiply the original length by a scale factor of 3/4:
