Question

MEDAL FOR RIGHT ANSWER HERE!!!!!!!!!!!!!!!!
A biologist created the following graph to show the relationship between the temperature of water (x), in degrees Celsius, and the number of insect larvae (y) in the water:

graph of y equals minus 2 times the square of x plus 20 times x plus 400

What do the x-intercepts of the graph represent?
There were 20 larvae at 0 degrees Celsius.
There were 10 larvae at 0 degrees Celsius.
The water has no larvae at -10 degrees Celsius and 20 degrees Celsius.
The water has maximum larvae at -10 degrees Celsius and 20 degrees Celsius.

Answer 1

@Mehek14

Answer 2

\(\large \color{black}{\begin{align}
y=-2x^{2}+20x+400\hspace{.33em}\\~\\

\end{align}}\)

Answer 3

what does that mean

Answer 4

for \(x\)-intercepts set \(y=0\) and solve
\(\large \color{black}{\begin{align}
0=-2x^{2}+20x+400\hspace{.33em}\\~\\

\end{align}}\)

Answer 5

and the answer is?

Answer 6

do u know how to solve this

\(\large \color{black}{\begin{align}
0=-2x^{2}+20x+400\hspace{.33em}\\~\\

\end{align}}\)

Answer 7

no

Answer 8

A biologist created the following graph to show the relationship between the temperature of water (x), in degrees Celsius, and the number of insect larvae (y) in the water:

graph of y equals minus 2 times the square of x plus 20 times x plus 400
..........y = -2x² + 20x + 400

What do the x-intercepts of the graph represent?
..........C) The water has no larvae at -10 degrees Celsius
................and 20 degrees Celsius.