Answer:

Step By Step Explanation:
Goal: Write an equation that can be used to find her balance after 't' years
Deposit: $3,000
Interest: 4.2%
Turn 4.2% Into Decimal
Decimal: 0.42
't': 't' is undefined, so 't' stays the same
Balance = B
Balance = 3,000 Multiplied By 1 + 0.42. That is then multiplied by itself 't' times
Double angle identity for cosine:

By the Pythagorean theorem, if

, it follows that

:

where we take the positive root because

, and

is non-negative throughout this domain.
So we have
Answer:
multiply numbers ADD exponents
- 21^7
- 8^6
- x^7+2x^6-x^4
- 3x^3y^2
- 2x^2+4x
- 3x^4+7x^3
Where is this restaurant? It sounds good right now.<span />
Answer:
-3xy
Step-by-step explanation: