A quadratic equation refers to an equation with the highest degree of 2. The first equation, 2(x+5)^2 + 8x + 5 + 6 = 0 is the only one with the highest degree of 2 (in (x+5)^2), so that is the quadratic.
Answer: The temperature of the object after one hour is 12.9°C to the nearest tenth of a degree
Step-by-step explanation:
Please see the attachments below
Answer: weekly income =10*35= $350
Monthly income = 350*4= $1400
Rent = 30%*1400
=$420
Step-by-step explanation:
Hi there!
Unfortunately, the beautiful fraction you've given us is simplified enough, and it cannot go any lower than what it is. So basically, you're left with 
Hope this helps!
Message me if you need anything else! I'd be happy to help! :D