Answer: For
![\\\Rightarrow\ y=4+0.75(m-5)\geq4+0.75(15-5)\\\Rightarrow\ y\geq4+0.75(10)\\\Rightarrow\ y\geq4+7.5\\\Rightarrow\ y\geq11.5](https://tex.z-dn.net/?f=%5C%5C%5CRightarrow%5C%20y%3D4%2B0.75%28m-5%29%5Cgeq4%2B0.75%2815-5%29%5C%5C%5CRightarrow%5C%20y%5Cgeq4%2B0.75%2810%29%5C%5C%5CRightarrow%5C%20y%5Cgeq4%2B7.5%5C%5C%5CRightarrow%5C%20y%5Cgeq11.5)
Nick does not has enough money to follow this recommendation.
Step-by-step explanation:
Given: A self-service car wash charges $4 for the initial 5 minutes plus an additional $0.75 for each minute after that.
Let y be the cost for car wash for m minutes then
such that at m= 5 , y=4 which is the cost for car wash (dollars) for first 5 minutes.
Also, A car enthusiast magazine recommends spending at least 15 minutes to properly wash a car.
For
![\\\Rightarrow\ y=4+0.75(m-5)\geq4+0.75(15-5)\\\Rightarrow\ y\geq4+0.75(10)\\\Rightarrow\ y\geq4+7.5\\\Rightarrow\ y\geq11.5](https://tex.z-dn.net/?f=%5C%5C%5CRightarrow%5C%20y%3D4%2B0.75%28m-5%29%5Cgeq4%2B0.75%2815-5%29%5C%5C%5CRightarrow%5C%20y%5Cgeq4%2B0.75%2810%29%5C%5C%5CRightarrow%5C%20y%5Cgeq4%2B7.5%5C%5C%5CRightarrow%5C%20y%5Cgeq11.5)
But Nick has $10 which is less than $11.5, so he does not has enough money to follow this recommendation.
a) FALSE (would be TRUE if it said LN(56)-LN(7)=LN(8))
b) TRUE (because LN(x+y)-LN(x+y)=LN[(x+y)/(x+y)]=LN(1)=0)
Answer:
2 imaginary roots
Step-by-step explanation:
The discriminate is the portion of the quadratic equation under the square root
D = b^2 - 4ac
D = 8^2 - 4(2)(16)
D = 64 - 128
D = -64
Since the discriminate is negative the square root will be imaginary
and there will be 2 of them
2 imaginary roots
Okjhgfdfghjjhgfdfghjhgfdfghjsdfghjkhgfdsfghjrhrthrthtj