9 and 6 would be the answer because divide by 2 then add 1 to one side and subtract 1 from another,
The solutions of given equation are -3, -1 and 3.
Answer:
It will take
weeks to complete the repair of the stretch of road.
Step-by-step explanation:
Given:
Length of the roads that need repairs = ![16\frac{1}{2}\ km](https://tex.z-dn.net/?f=16%5Cfrac%7B1%7D%7B2%7D%5C%20km)
Length of the road workers can repair in a week = ![2\frac{1}{4}\ km](https://tex.z-dn.net/?f=2%5Cfrac%7B1%7D%7B4%7D%5C%20km)
To find the number of weeks will it take to repair this stretch of road.
Solution:
Unit rate of workers to repair roads =
per week.
Total length of the roads to repair = ![16\frac{1}{2}\ km](https://tex.z-dn.net/?f=16%5Cfrac%7B1%7D%7B2%7D%5C%20km)
The number of weeks it will take to repair
of road by workers can be given as:
⇒ ![\frac{16\frac{1}{2}\ km}{2\frac{1}{4}\ km}](https://tex.z-dn.net/?f=%5Cfrac%7B16%5Cfrac%7B1%7D%7B2%7D%5C%20km%7D%7B2%5Cfrac%7B1%7D%7B4%7D%5C%20km%7D)
<em>In order to divide mixed numbers, we convert them first to fractions.</em>
⇒ ![\frac{\frac{33}{2}} {\frac{9}{4}}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Cfrac%7B33%7D%7B2%7D%7D%20%7B%5Cfrac%7B9%7D%7B4%7D%7D)
<em>To divide fractions, we take reciprocal of the divisor and replace division with multiplication:</em>
⇒ ![\frac{33}{2}\times \frac{4}{9}](https://tex.z-dn.net/?f=%5Cfrac%7B33%7D%7B2%7D%5Ctimes%20%5Cfrac%7B4%7D%7B9%7D)
⇒ ![\frac{22}{3}](https://tex.z-dn.net/?f=%5Cfrac%7B22%7D%7B3%7D)
We reconvert the fraction to mixed number.
⇒
weeks
Thus, it will take
weeks to complete the repair of the stretch of road.
SinY = 7.2/22.2
TanY =7.2/21
CosY = 21/22.2
Answer:#1 = 16
#2 = 4
Step-by-step explanation: