Answer:
It takes 1 year.
Step-by-step explanation:
You have to apply simple interest formula, I = (P×R×T)/100 where I represent interest amount, P is principle, R is interest rate and T is number of years :




1.
1/4 is less then 2/4 or 1/2so if the denominator is equal it will be easier to multiply
x+4y=15 2x-y=-15
We have to make x neg.
-2(x) + 4y (-2)= -2(15)
-2x-8y=-30
2x-y=-15
-9y= -45
Solve for y
Y=-45/-9
Y = 5
Substitute your y answer into one original equation to find x .
x+4y=15
X+4(5)=15
X+20=15
X=15-20
X= -5
Answer is (-5,5)
Slope-intercept form is as shown here: y = mx + b
(-8, 1) and (0, -5) in slope-intercept form will be y = -3/4x - 5
(-3, -8) and (2, 7) in slope-intercept form will be y = 3x + 1