X = A/y
You divide the y from both sides
The y on the right cancels
On the left you have A/y = x
1+3x /4= 5/2
1+3x = 5*4/2
1+3x =10
3x =9
x = 3
I=PRT
P=present amount
R=rate
T=time
basically
20+interest<u /> is more than or equal to 400
20+I<u>></u>400
minus 20 both sides
I<u>></u>380
solve
P=20
R=3%=0.03
T=?
I=PRT
380<u><</u>I=PRT
380<u><</u>20(0.03)(T)
380<u><</u>0.6T
divide both sides by 0.6
633.33333<u><</u>T
633.33 years at least
Answer:
True,True,3=8-5 (y=3),E,39
Step-by-step explanation: