3x+y=6
3x-y=6
Cancel out the Y and add the terms
6x=12
X=2
Plug 2 into one of the original equations to find Y
3(6)+y=6
18+y=6
Y=-12
Write as ordered pair: (6,-12)
Answer:
1.
a) 40 b) 8 c) 27 2/3 d) 4
2.
a) 93 b) -95 c) -87 d) -81
3(4+n)=18+n
distribute
12+3n=18+n
minus n both sides
12+2n=18
minus 12 both sides
2n=6
divide by 2
n=3
the number is 3
equation is
3(4+n)=18+n
Answer:
661 is for the first 308 for second 849 for last
Step-by-step explanation:
Using conversion of units and volume of a cylinder, it is found that 23.17 cubic yards of concrete are needed, option D.
The volume of a cylinder of radius r and height h is given by:

In this problem:
- We want the volume in cubic yards, thus, the units of radius and height have to be in yards.
- 32 inches in diameter, thus 16 inches of radius. Since each inch has 0.0278 yards, this is a radius of 0.44 yards, thus
. - Height of 8 feet, and since each feet has 0.33 yards, this is a height of 2.67 yards, thus

- 14 poles, thus the volume is multiplied by 14.
Then:

23.17 cubic yards of concrete are needed, option D.
A similar problem is given at brainly.com/question/22789697