Answer:
whats the question
Step-by-step explanation:
Answer:
6.50w
Step-by-step explanation:
Given that :
Weight ________ Cost ($)
1 ______________6.50
2 _____________ 13.00
3 _____________ 19.50
Cost of package that weighs w pounds
If one pound = 6.50
2 pounds = 13.0
Then, the cost per pound = $6.50
Hence, cost of package that weighs w pounds will be ;
$6.50 * w = $6.50w
Answer: $57,000
Step-by-step explanation:
Understand what is being asked. 1st yr is 9000. Yr 2 is 9000+1200= 10200. Yr 3 =10,200+1200=11,400. Yr 4 is 11,400 +1200=12,600 and Yr 5 is 12600+1200=13,800. Over the course of 5 yrs you are paying 9000+10200+11400+12600+13800 which has a total sum of $57,000.
Two equal roots means a discriminant of zero.
(k + 2)x² + 4k = (4k + 2) x
(k + 2)x²- 2 (2k + 1) x + 4k = 0
When we have an even linear term it's easier to generate 1/4 of the usual discrimant,
0 = d/4 = (b/2)^2 - ac = (2k + 1)² - 4k(k+2) = 4k² + 4k + 1 - 4k² - 8k = -4k + 1
4k=1
k=1/4
Answer: k=1/4
Check:
(k + 2)x² + 4k = (4k + 2) x
(9/4)x² - 3x + 1 = 0
9x² - 12x + 4 = 0
(3x - 2)² = 0
A perfect square, two equal roots, good
