Answer:
A.16–i is correct.
Step-by-step explanation:
(4+i)(4–i). [(a+b)(a–b)=(a²–b²)]
(4²–i²)=16–i
I hope this answer is correct so please vote my answer
Answer:
<h2>Per week: $1041.04</h2><h2>Per month: $4610.32</h2><h2>Per year: 55323.84</h2>
Answer:
115mm
Step-by-step explanation:
5/x = 3/69
5/x = 1/23
5*23 = x
115 = x
Answer:
what do you need help wth ?
Step-by-step explanation:
Answer: ![12\ \text{min}](https://tex.z-dn.net/?f=12%5C%20%5Ctext%7Bmin%7D)
Step-by-step explanation:
Given
It takes 20 min and 30 min for a person and his friend to paint a wall individually i.e.
In 1 min they cover
part and
part of wall respectively.
If the work together, 1 minute work is
![\Rightarrow \dfrac{1}{20}+\dfrac{1}{30}\\\\\Rightarrow \dfrac{3+2}{60}\\\\\Rightarrow \dfrac{5}{60}](https://tex.z-dn.net/?f=%5CRightarrow%20%5Cdfrac%7B1%7D%7B20%7D%2B%5Cdfrac%7B1%7D%7B30%7D%5C%5C%5C%5C%5CRightarrow%20%5Cdfrac%7B3%2B2%7D%7B60%7D%5C%5C%5C%5C%5CRightarrow%20%5Cdfrac%7B5%7D%7B60%7D)
Time required will be reciprocal of it
![\Rightarrow \dfrac{60}{5}=12\ \text{min}](https://tex.z-dn.net/?f=%5CRightarrow%20%5Cdfrac%7B60%7D%7B5%7D%3D12%5C%20%5Ctext%7Bmin%7D)