The value, v, of kalani’s stock investments over a time period, x, can be determined using the equation v=750(0.80)^-x what is the rate of increase or decrease associated with this account?
20% decrease
20% increase
25% decrease
25% increase

X+y=-4 x-y=2 use elimination with adding and subtraction

10 points? ? +++ me asap gabriella uses the current exchange rate to write the function, h(x), where x is the number of u.s. dollars and h(x) is the number of euros, the european union currency. she checks the rate and finds that h(100) = 7.5. which statement best describes what h(100) = 75 signifies? a) gabriella averages 7.5 u.s. dollars for every 100 euros. b) gabriella averages 100 u.s. dollars for every 25 euros. c) gabriella can exchange 75 u.s. dollars for 100 euros. d) gabriella can exchange 100 u.s. dollars for 75 euros.

I’m still confused on how to work the percentages