Y=–3x + 6 y=9
what is the solution to the system of equations?

(–21, 9)
(9, –21)
(–1, 9)
(9, –1)

(- 1, 9 )

Step-by-step explanation:

Given the 2 equations

y = - 3x + 6 → (1)

y = 9 → (2)

Substitute y = 9 into (1) and solve for x

9 = - 3x + 6 ( subtract 6 from both sides )

3 = - 3x ( divide both sides by - 3 )

- 1 = x

Solution is (- 1, 9 )

15

step-by-step explanation:

b.) 160 miles on a 5 gallons car

step-by-step explanation:

240/10=24 miles/gallon

160/5=32 miles/gallon

30/1=30 miles/gallon

168/6= 28 miles/gallon

32 miles/gallon is the most amount, so this is the best.