Answer: 
Step-by-step explanation:
To solve the exercise you must apply the following proccedure:
- Apply the distributive property.
- Keepn on mind that when you multiply two powers with equal base, you must add the exponents.
- Add like terms.
Then:
Answer:
each card's thickness ×no of cards=total thickness
3/160×X=3/4
X=3/4×160/3
X=40
40 cards r in the stack
Answer:
x = 12
Step-by-step explanation:
Since the triangles are similar then the ratios of corresponding sides are equal, that is
= 
, substitute values
= 
( cross- multiply )
4x = 48 ( divide both sides by 4 )
x = 12
The answer is the first row 12, 24, 48, 96
Answer:
m^2+4m-21
Step-by-step explanation:
(m-3)(m+7)
m^2-3m+7m-21
m^2+4m-21
