Will mark brainlest
create an equivalent system of equations using the sum of the system and the first equation.

x + 4y = 8
4x + y = 2

a. x + 4y = 8
5x + y = 2

b. x + 4y = 8
5x + 5y = 2

c. x + 4y = 8
4x + 5y = 10

d. x + 4y = 8
5x + 5y = 10

Find the volume of the solid generated when the region bounded by y= x and y= 4√x is revolved about the x-axis the volume of the solid is: (type an exact answer cubic units)

Given: x + y = 6. if xe (-15, -6, -1), then which of the following sets of ordered pairs are solutions? © {(-15, -21), (-6, -12), (-1, -7)} [(-15, 21), (-6, , 7)} {(-15, 21), (-6, 12), (-1, -7)}

Kyle and elijah are planning a road trip to california. their car travels 3/4 of a mile per min. if they did not stop driving, how many miles could kyle and elijah drove in a whole day? ? 1 day = 24 hours. plzzz write a proportion i will give you 100 points