One morning in February, the temperature outside Maria’s house was -1 degrees Fahrenheit. By 5:00 p. m., the temperature had decreased by 3 degrees Fahrenheit. Which expressions can be used to find the temperature at 5:00 p. m. in degrees Fahrenheit?

Select all the correct expressions.

A
1+(−3)

B
1−3

C
−1+(−3)

D
−1+3

E
−1−3

-2

7 - 9 = -2

reversed:

-2 + 9 = 7

a - base

b - exponent

so,

definitely a. the others have almost all data points on one side of the line.

step-by-step explanation:

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,