The temperature is -3°f at 7: 00 a. m. during the next 4 hours, the temperature increases 21°f. what is the temperature at 11: 00 a. m.?
the temperature at 11: 00 a. m. is
°f.

The temperature at 11:00 A.M. is  18°F.

Step-by-step explanation

From -3 to 0=3

From 0 to 18 = 18

18+3 =21

pls ask

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18