Answer: I think its B and C
A.
Selena makes 0.05 posters per minute
Jason makes 0.2 posters per minute
Kai makes 0.2 posters per minute
Enrique makes 0.1 posters per minute
Andre makes 0.5 posters per minute
B.
Selena makes the least posters per minute
Andre makes the most posters per minute
C.
If Selena made 80 posters in 8 minutes, she would be making 10 posters per minute.
Selena now makes the most posters and Enrique makes the least.
Hope this helps!! :)
Step-by-step explanation:
the correct answer is c
Answer:
- 6. See solution
- 7. k = 2, k = -6
Step-by-step explanation:
6.
<u>Given equation:</u>
- The sum of the roots is q1 and the product of the roots is q2
Need to show that q1+q2 = 0
<h3>Solution</h3>
<u>Bringing the equation into standard form of ax² + bx + c = 0:</u>
- 2(x + 2)² + p(x + 1) = 0
- 2x² + 8x + 8 + px + p = 0
- 2x² + (p + 8)x + (p + 8) = 0
<u>Sum of the roots: </u>
<u>Product of the roots:</u>
<u>We see that q1 and q2 are opposite numbers, therefore their sum equals zero:</u>
- q1 + q2 = -(p + 8)/2 + (p + 8)/2 = 0
=============================================
7.
<u>Given quadratic equation:</u>
Need to find the possible values of k
<h3>Solution</h3>
<u>When the quadratic equation has equal roots, then its discriminant is equal to zero:</u>
- D = 0
- √b² - 4ac = 0
- √(-k -2)² - 4*1*4 = 0
- √k² + 4k + 4 - 16 = 0
- √k² + 4k - 12 = 0
- k² + 4k - 12 = 0
- k = {-4 ± √4² -4*1*(-12)}/2
- k = (-4 ± √16 + 48)/2
- k = (-4±√64)/2
- k = -2 ± 4
- k = 2, k = -6
estimate = (40 * 50) / (4 * 5)
= 2000 / 20 = 100 (answer)
