It falled at a unit rate of 2. Divide 20 by 10 . Mark me the brainlyest
Answer:
81 lots of 5,000 square feet fits in the property.
Step-by-step explanation:
<em><u>The first step </u></em>is calculate the square feet of the minimum area:
<em><u>Second,</u></em> from the ten acres we subtract the 26,000 feets of roads:
<em><u>Third,</u></em> we divide the lot area over the available square feet
81 lots of 5,000 square feet fits in the property.
15 mi/h= 15mi/60 min= 1/4 (mi/min)
x is original speed (mi/min)
t is original time
x*t =260
(x+1/4)=5x/4 is new speed
t-20 - new time
(x+1/4)(t-20)=260
xt = (x+1/4)(t-20)
xt=xt + t/4 - 20x - 5
t/4=20x+5
t=80x +20
We can substitute t=80x +20 into equation x*t =260
x*(80x+20)=260
80x²+20x-260=0
4x²+x-13=0
D=b² - 4ac = 1+4*4*13= 209
x=(-1+/-√209)/2*4
x=1.68 mi/min
1.68mi/min * 60 min/1h≈100 mi/h
Check
260/100=2.6h time with old speed
260/(115)=2.26 h time with new speed
2.6-2.26 = 0.34 h difference between old and new time
0.34h*60min/1h≈20 min difference between old and new time in minutes
The correct answer to determine the change in he account is by:
C. Subtracting last Monday's account balance from this Monday's account balance to find that the change in the balance is -$24.10.
Hope This helped :)
