Answer:
Is this question wrong?
Step-by-step explanation:
4x+3y=16
4(-3)+3(-2)=16
-12-6=16
-18=16
36 divided by s. With s representing the number of shelves.
You need to use the quadratic formula for this question.
![\frac{-b+- \sqrt{b^2-4ac} }{2a}](https://tex.z-dn.net/?f=%20%5Cfrac%7B-b%2B-%20%5Csqrt%7Bb%5E2-4ac%7D%20%7D%7B2a%7D%20)
In your equation, a is 1, b is 6, and c is 4. (I couldn't find a plus minus sign, so that's what the +- means, sorry if there's confusion.)
Sub those into the quadratic formula, and
![\frac{-6+- \sqrt{(6)^2-4(1)(4)} }{2(1)}](https://tex.z-dn.net/?f=%20%5Cfrac%7B-6%2B-%20%5Csqrt%7B%286%29%5E2-4%281%29%284%29%7D%20%7D%7B2%281%29%7D%20)
For the first answer, we should get
x1=-0.7639, when you add the √6^2-4(1)(4)
For the second answer, we get
x2=-5.2361 when we subtract the √6^2-4(1)(4)
Therefore, the x values that make this equation equal to 0 should be approximately -0.7639 and -5.2361.
The more specific answers are
x1= -3+√5 and x2=-3-√5.
3/4 of the way is:
540 miles* (3/4)= 405 miles.
405 miles* (1 hour/ 45 miles)= 9 hours.
(Note that the unit cancels out so you get the answer)
The final answer is 9 hours~