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? (1 point)

a
There were 20 larvae at 0 degrees Celsius.

b
There were 10 larvae at 0 degrees Celsius.

c
The water has no larvae at −10 degrees Celsius and 20 degrees Celsius.

d
The water has maximum larvae at −10 degrees Celsius and 20 degrees Celsius.

c

The water has no larvae at −10 degrees Celsius and 20 degrees Celsius.

Step-by-step explanation:

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!

beluga wheeeaaalle matt

step-by-step explanation: