2x-5y=16 =>10x-25y=80
5x+3y=9 => 10x+6y=18
subtract one from the other: (6-(-25)y=(18-80), 31y=-62, y=-2
plug y=-2 in 2x-5y=16 to find x: 2x+10=16, x=3
12x+y=12*3-2=34
Answer:
She used 67/60 of a bag of gravel in one day.
Step-by-step explanation:
We must get a common denominator so we can add the two fractions.
Let's use 60!
1/5 = 12/60
11/12 = 55/60
Now we can add and get 67/60!
She used 67/60 of a bag of gravel in one day.
Answer:
x=7
Step-by-step explanation:
by pythagoras, 25^2=24^2+x^2
solve for x