(a + 1)(a² + 2a + 1)
= a(a² + 2a + 1) + 1(a² + 2a + 1)
= a³ + 2a² + a + a² + 2a + 1
= a³ + 3a² + 3a + 1
Answer: b
1. 2r-5
2. -21r-50
3. 4r-50
4. 14r+50
5. 19r-50
Step-by-step explanation:
7z-5=4y-6
-4y=-6-7z+5
-4y=-1-7z
y=1/4+7/4z
y=7/4z+1/4
7z=4y-6+5
7z=4y-1
z=4/7y-1/7
Answer:
104 cm squared
Step-by-step explanation:
none.
Answer:
1 day: 4480
2 days: 8960
3 days: 13440
---- function inverse
Step-by-step explanation:
Given

Solving (a): The amount present after 1 day.
Here, 
So:

Solving (b): The amount present after 2 days.
Here, 
So:

Solving (c): The amount present after 3 days.
Here, 
So:

Solving (d): The inverse function of:

Replace f(x) with y

Swap x and y

Rewrite as:

Divide by 4

Take square roots

Replace y with function inverse
