Answer:
3.83333
Step-by-step explanation:
6x+1=3(9)-3
6x+1=24
6x=23
x=3.833333
4 ( x + 9) = x + 9 <em>(remove the parantheses)</em>
4x + 36 = x + 9<em> (move the terms)</em>
4x - x = 9 - 36 <em>(collect like terms and calculate)</em>
3x = -27 <em>(divide both sides)</em>
solution : x = -9
OK. I did it, and I have the solution.
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The length of the deck is (5 + 2x) .
The width of the deck is (4 + 2x) .
If the deck didn't have that big hole in the middle where the pool is,
then its area would be
(5 + 2x) · (4 + 2x) .
When you multiply that all out, you get Area = 4x² + 18x + 20
and the question tells us that the area of the whole big rectangle is 90 yds² .
So we can write
4x² + 18x + 20 = 90 .
Subtract 90 from each side: 4x² + 18x - 70 = 0
Divide each side by 2 : 2x² + 9x - 35 = 0
You can use the quadratic equation to solve that and find out that
x = 2.5 yards, and that's what the question is asking you.
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That makes the deck 10 yds high and 9 yds wide.
Total area of the whole big rectangle, (deck + pool ), = 90 yds².
Answer:
y = 9
Step-by-step explanation:
-2y+6=-12
subtract 6 on both sides: -2y=-18
divide both sides by -2: y=9
Answer:
x = 18
Step-by-step explanation:
Given
6 - x = - 12 ( subtract 6 from both sides )
- x = - 18 ( multiply both sides by - 1 )
x = 18