General vertex form:

Given :

Extract "spread factor" m

Complete the square


Write as a squared binomial and simplify the constant

Re-write to match signs of standard general form:

Answer:
Step-by-step explanation:
<u>80:50:20 or 8:5:2. 8 ÷ 15 * 30 = 16 = 16 - 10 = 6. This is the solution.</u>
- Option A. 30 + 10 = 40. Incorrect. The solution is unequal to this.
- Option B. 30 + 9 = 39. Incorrect. The solution is unequal to this.
- Option C. 30 + 8 = 38. Incorrect. The solution is unequal to this.
- Option D. 30 + 7 = 37. Incorrect. The solution is unequal to this.
- Option E. 30 + 6 = 36. Correct. The solution equals this answer.
<u>Option E will be the answer.</u>
First solve for x in the first equation. So you'll have to substitute,
5(3x-7)=20
15x-35=20
Then add 35 to both sides.
15x=55
Divide 55 by 15.
So x = 3.66...
Then plug in 3.7 for x in 6x-8
6(3.7)-8
Its approximately 14.2
I believe the correct answer from the choices listed above is option A. The <span>system can be changed so that the two equations have equal x-coefficients by multiplying </span><span>both sides of the top equation by 2 resulting to 6x + 4y = 24. Hope this answers the question.</span>