All I did was I wrote out the equations, L = 2w - 5 and 2L + 2W = 26. I then substituted what L was into the equation and solves. Here's my work if you would like to see it.

8 0

3 years ago

X^2-x+12 solve using the quadratic formula

devlian [24]

The quadratic formula is $x=\frac{-b\pm\sqrt{b^2-4ac} }{2a}$ .

From the problem, a is 1, b is -1, and c is 12. Plugging in these values gives:

$x=\frac{-(-1(-1)\pm\sqrt{(-1)^2-4(1)(12)} }{2(1)}$

Because there is a square root of a negative number, there is no solution.

4 0

4 years ago

Simplify the expression by combining like terms. 16+8a−3a+6b−9

Svetradugi [14.3K]

7+5a+6b is the answer because 16-9 is 7 and 8-3 is 5.

4 0

3 years ago

Read 2 more answers

One student can paint a wall in 20 minutes. Another student can paint the same wall in 30 minutes. Working together, how long wi

Katarina [22]

1) in one minute for first wiil be 1/20

the other 1/30, it means that A paint in one minute 1/20 and B 1/30 then A+B in one minute 1/20 + 1/30 = 3+2/60 = 5 / 60, 5/60 = 1/12

if in one min they make 1/12 then in 12 min they paint all the wall

5 0

3 years ago