The temperature at 10 A. M. was -4 °F. By noon the temperature had risen 8 °F. At 8 P. M., the temperature had dropped 10° F. What was the temperature at 8 P. M.? *

-6

Step-by-step explanation:

-4+8=4

4-10= -6

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

c 1 hour

step-by-step explanation:

m = 2e

m = 2 so 2 = 2e

1 = e