What is the solution to this system of equations? x + y = 6
x = y + 4

A: (11/2, 1/2)
B: (21/2, 11/2)
C: (5, 1)
D: (1, 5)

(5, 1) (Answer C)

Step-by-step explanation:

Note that the second equation features x as a function of y:  x = y + 4.  We can substitute y + 4 for x in the first equation, obtaining:

y + 4 + y = 6

and then, after we combine like terms,

2y = 2, or y = 1.

x = y + 4, subbing 1 for y here results in x = 1 + 4, or x = 5

The solution is (5, 1) (Answer C)

50 min

step-by-step explanation:

they will be decreasing both their times in half

60 / 2 = 30

40/2 = 20

30 + 20 = 50

the correct answer is you spend $55.78 more in a brand store that buy ing in a normal store.

step-by-step explanation:

brand = spend   $ 135.85 total

store = spend $80.07 total