Hey i need with system of equations.
i uploaded a doxs file you can onpen it in google docs

Step-by-step explanation:

PART A:

The first equation is

The second equation is

Putting the value of y from (a) in the above equation, we get

From (a) we get y = 7 - x = 7 - 15 = -8

PART B:

Here the system of equations are

From (a) we get,

Putting the above value of x in (b) we get,

Hence,

good for u

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.