Solve for x:
2 (6 - x) = x (x + 5)
Expand out terms of the left hand side:
12 - 2 x = x (x + 5)
Expand out terms of the right hand side:
12 - 2 x = x^2 + 5 x
Subtract x^2 + 5 x from both sides:
-x^2 - 7 x + 12 = 0
Multiply both sides by -1:
x^2 + 7 x - 12 = 0
x = (-7 ± sqrt(7^2 - 4 (-12)))/2 = (-7 ± sqrt(49 + 48))/2 = (-7 ± sqrt(97))/2:
Answer: x = (-7 + sqrt(97))/2 or x = (-7 - sqrt(97))/2
The correct answer is @, because Kim rode15 miles per week, and Eric rode 17 per week
Answer:
The answer to you equation is 4
Step-by-step explanation:
Step 1: take the m and replace it 21 the multiply 21 and the numerator to get 21 over 3.
Step 2: divide 21 and 3 to get 7
Step 3: take the n and replace it with 12 then multiply 12 and 1 to get 12/2
Step 4: divide 12 and 2 to get 6
Step 5: then you do 7-1-2 which equals 4
Answer:
<h2>
</h2>
Step-by-step explanation:
<em><u>As</u></em>,
<em><u>Hence</u></em><em><u>, </u></em>
= 2×2×x×x
