The rate for the first is 1 job / 35 minutes and for the second is 1 job / 15 minutes. So combined we get
r = 1/35 + 1/15
3×5×7r = 3 + 7 = 10
r = 10/(105) jobs per minute
We're interested in 1/r
1/r = 105/10 = 10.5 minutes per job
Answer: 10.5 minutes
Answer:
(3-2h)^3 + (3-2h)^4 = (3-2h^2)^3 (1 + (3-2h^2))
Answer:5) x=y=7×6^1/2,6)x=38,y=19×3^1/2
7)m=n=18,8)u= 2×5^1/2,v=3
Step-by-step explanation: use trigonometry laws
Answer:
Step-by-step explanation:
![LHS =\dfrac{1}{Sin^{2} \ A }-\dfrac{1}{Tan^{2} \ A }\\\\\\ = \dfrac{1}{sin^{2} \ A}- \dfrac{1}{\dfrac{Sin^{2} \ A}{Cos^{2} \ A}}\\\\\\= \dfrac{1}{sin^{2} \ A } - \dfrac{Cos^{2} \ A}{Sin^{2} \ A}\\\\\\= \dfrac{1-Cos^{2} \ A}{Sin^{2} \ A}\\\\\\= \dfrac{Sin^{2} \ A}{Sin^{2} \ A}\\\\\\= 1 = \ RHS](https://tex.z-dn.net/?f=LHS%20%3D%5Cdfrac%7B1%7D%7BSin%5E%7B2%7D%20%5C%20A%20%7D-%5Cdfrac%7B1%7D%7BTan%5E%7B2%7D%20%5C%20A%20%7D%5C%5C%5C%5C%5C%5C%20%3D%20%5Cdfrac%7B1%7D%7Bsin%5E%7B2%7D%20%5C%20A%7D-%20%5Cdfrac%7B1%7D%7B%5Cdfrac%7BSin%5E%7B2%7D%20%5C%20A%7D%7BCos%5E%7B2%7D%20%5C%20A%7D%7D%5C%5C%5C%5C%5C%5C%3D%20%5Cdfrac%7B1%7D%7Bsin%5E%7B2%7D%20%5C%20A%20%7D%20-%20%5Cdfrac%7BCos%5E%7B2%7D%20%5C%20A%7D%7BSin%5E%7B2%7D%20%5C%20A%7D%5C%5C%5C%5C%5C%5C%3D%20%5Cdfrac%7B1-Cos%5E%7B2%7D%20%5C%20A%7D%7BSin%5E%7B2%7D%20%5C%20A%7D%5C%5C%5C%5C%5C%5C%3D%20%5Cdfrac%7BSin%5E%7B2%7D%20%5C%20A%7D%7BSin%5E%7B2%7D%20%5C%20A%7D%5C%5C%5C%5C%5C%5C%3D%201%20%3D%20%5C%20RHS)
Hint: 1 - Cos² A = Sin² A
Answer:
98%
Step-by-step explanation:
You add 78 and 20.
Tell me if it is wrong.
Thank you.