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11111nata11111 [884]
3 years ago
10

6x+(x-2)=180 solve this and explain

Mathematics
2 answers:
Nookie1986 [14]3 years ago
4 0
<span>Simplify 6x + (x + -2) = 180
6x + (-2 + x) = 180
  Remove parenthesis around (-2 + x) 6x + -2 + x = 180
 Reorder  -2 + 6x + x = 180
 Combine like terms: 6x + x = 7x -2 + 7x = 180
  -2 + 7x = 180
 Move all terms containing x to the left, all other terms to the right.
 Add '2' to each side of the equation. -2 + 2 + 7x = 180 + 2
 Combine like terms: -2 + 2 = 0 0 + 7x = 180 + 2 7x = 180 + 2
 Combine like terms: 180 + 2 = 182 7x = 182
 Divide each side by '7'. x = 26
 Simplified answer x = 26</span>
Sav [38]3 years ago
3 0
<span>Simplifying 6x + (x + -2) = 180
 Reorder the terms: 6x + (-2 + x) = 180
 Remove parenthesis around (-2 + x) 6x + -2 + x = 180
 Reorder the terms: -2 + 6x + x = 180
 Combine like terms: 6x + x = 7x -2 + 7x = 180
 Solving -2 + 7x = 180
 Solving for variable 'x'.
 Move all terms containing x to the left, all other terms to the right.
 Add '2' to each side of the equation. -2 + 2 + 7x = 180 + 2
 Combine like terms: -2 + 2 = 0 0 + 7x = 180 + 2 7x = 180 + 2
 Combine like terms: 180 + 2 = 182 7x = 182
 Divide each side by '7'. x = 26
 Simplifying x = 26</span>
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x is the temperature and y is the number of swimmers. If there are 80 swimmers, then y = 80 instead of x = 80

This is how Corey should have solved

y = 1.505*x - 88.21

80 = 1.505*x - 88.21 <--- replace y with 80

1.505*x - 88.21 = 80

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If there are 80 swimmers at the pool, then the possible outside temperature is roughly 111.8 degrees F. This temperature seems awfully large, so it's possible that Corey's regression equation has limited scope; in other words, it isn't too useful if x is outside a given interval.

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