When asked these kinds of problems you find the discriminate and use that to tell if you have one , two or zero real solutions.
The formula for the discriminate is b^2 - 4ac. I hope that looks familiar because it is the inside part of the quadratic formula. (the part under the radical)
so if your answer is greater than zero you have two solutions
if your answer is equal to zero you have one solution
if your answer is less than zero you have no real solutions it will be a complex solution.
So lets apply all that to your question:
5^2 - 4(1)(7) = -3
so your answer would be B no real-number solution.
• Increased by 3
n+3
• Twice the number
2(n+3)
• Three times the number
3n
• Final result
2(n+3)-3n
Using the scatter plot, we can obtain the prediction for the number of beach visitors when the average daily temperature is 88°F by drawing a line of best fit which cuts through at least 3 points. When we do this we obtain the best estimate to be 350 visitors.
Answer: B] 350 visitors
I believe that the answer is A. If you need any help with how to show work I'd be happy to help you in the comments :0 hope this helps!
The answer is 0.305. All you have to do is move the decimal place three times to the left.