Two lines, r and m, are represented by the following equations:

line r: 2x + 2y = 18
line m: x + y = 9

which statement is true about the solution to the set of equations? (4 points)

select one:
a. it is (18, 9).
b. it is (9, 18).
c. there are infinitely many solutions.
d. there is no solution

c

Step-by-step explanation:

Note that line M is the same equation as line R and hence there are infinitely many solutions.

Line R : 2x + 2y = 18

Line M : x + y = 9 ⇒ 2x + 2y = 18

the car was traveling 40 mph before it started skidding. ( 2 points ) 17. was the driver were her brakes working at 75% efficiency or better? ( 2 points ) yes 29.

step-by-step explanation:

1,407.5 hours

step-by-step explanation:

we first convert all the time to hours and then sum them up.

there are 24 hours in 1 day, in 58 days, there are 24 x 58 = 1,392 hours.

there are 60 minutes in 1 hour, thus, 30 minutes will be equivalent to 30 / 60 = 0.5 hours.

therefore, the number of hours it will take mercury to complete a full rotation is 1,392 + 15 + 0.5 = 1,407.5 hours