10 I think or 10.476 I think that's the answer I just think
Answer:
x=60
Step-by-step explanation:
We have, 15% × x = 9
or,
15
100
× x = 9
Multiplying both sides by 100 and dividing both sides by 15,
we have x = 9 ×
100
15
x = 60
If you are using a calculator, simply enter 9×100÷15, which will give you the answer.
Answer:
Step-by-step explanation:
let x be part at 8%, y be part at 10% and z be part at 15%
(1) x+y+z=6300
the amount of money invested at 15% was $100 more than the amounts invested at 8% and 10% combined. so
(2) z=x+y+100
The total annual income from these investments was $766. so
0.08x+0.1y+0.15z=766 or
(3) 8x+10y+15z=76600
substitute (2) into (1)
x+y+x+y+100=6300
(4) 2x+2y=6200
substitute (2) inot (3)
8x+10y+15(x+y+100)=76600
(5) 23x+25y=75100
solving (4) n (5)
x=1200
y=1900
z=1200+1900+100=3200
Set the growth factor equal to 2
Solve for t, Take natural log of both sides
Answer:
See below.
Step-by-step explanation:
40 + 15x = 30 + 19x
15x - 19x = 30 - 40
-4x = -10
x = 2.5
Two and a half hours.
