7x-1+7x+8+5x+2=180
7x+7x+5x+2-1+8=180
19x+9=180
19x=180-9
19x=171
19x\19=171\19
x=9
therefore,7x-1
7(9)-1
=62
therefore, 7x+8
7(9)+8
=71
therefore 5x+2
5(9) +2
=47
What...huh?? English please
Sara got 88, 90, 75, 78, 100, 54, 90, 100, 45, and 60 on her English tests. Lee got 77, 67, 99, 79, 100, 65, 79, 89, 58, and 67
satela [25.4K]
The mean is the average, so I added up all the numbers and divided that by the number of tests:
Sara's mean: 78
Lee's mean: 78
To determine how much sand she needs, we need the area of the garage
The area can be found by multiplying the width and the length
A = 36 x 20
A = 1080 feet
Now we multiply the area by the volume (2 inches of sand)
1080 * 2 = 2160
Siobhan needs 2160 feet of sand
.3.50 plus additional 6%= to 3.71 after the tax
