The table shows the height of a plant as it grows. what equation in point-slope form gives the plant’s height at any time? let y stand for the height of the plant in cm and let x stand for the time in months.

time(months) plant height
3 15
5 25
7 35
9 45

a. y – 15 = (x – 3)
b. y – 15 = 5(x – 3)
c. y – 3 = (x – 15)
d. the relationship cannot be modeled.

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

One month, a music site observed that 60% of the people who downloaded songs from its site downloaded q sam's latest single. the equation below represents this information, where x represents the total number of people who ddownloaded songs from the site that month: x = 0.6x + 384 how many people who downloaded songs from the site that month downloaded q sam's latest single?

21 type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. the solution set of n2 - 14n = -45 is { (separate the solutions with a comma)