Answer:
with what do u need help with?
Alright, we're in the home stretch here :) All you need to remember is that i² = -1. Otherwise, it is the same as FOIL
(3-2i)(1+7i)
3-2i+21i-14i² ← Replace the i² with -1, then simplify like numbers
3+19i+14
17+19i or C
Answer:
2/5
1/2
3/20
3/4
Step-by-step explanation:
Answer:
Step-by-step explanation:
(2n -3)(2n+1) = 4n^2 + 2n - 6n - 3 = 4n^2 - 4n -3
Answer:
The scale factor is ![\frac{3}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B3%7D%7B2%7D)
Step-by-step explanation:
The volume of the original prism is ![V_P=980cm^3](https://tex.z-dn.net/?f=V_P%3D980cm%5E3)
The volume of the dilated prism is ![V_Q=3307.5cm^3](https://tex.z-dn.net/?f=V_Q%3D3307.5cm%5E3)
Let the scale factor be
.
To find the volume of the dilated prism, we multiplied by
.
![\Rightarrow 980k^3=3307.5](https://tex.z-dn.net/?f=%5CRightarrow%20980k%5E3%3D3307.5)
![\Rightarrow k^3=\frac{3307.5}{980}](https://tex.z-dn.net/?f=%5CRightarrow%20k%5E3%3D%5Cfrac%7B3307.5%7D%7B980%7D)
![\Rightarrow k^3=\frac{27}{8}](https://tex.z-dn.net/?f=%5CRightarrow%20k%5E3%3D%5Cfrac%7B27%7D%7B8%7D)
![\Rightarrow k=\sqrt[3]{\frac{27}{8}}](https://tex.z-dn.net/?f=%5CRightarrow%20k%3D%5Csqrt%5B3%5D%7B%5Cfrac%7B27%7D%7B8%7D%7D)
![\Rightarrow k=\frac{3}{2}](https://tex.z-dn.net/?f=%5CRightarrow%20k%3D%5Cfrac%7B3%7D%7B2%7D)