Answer:
x=-3,x=9
Step-by-step explanation:
x^2-6x-20-7=0
x^2-6x-27=0
x^2-(9-3)x-27=0
x^2-9x+3x-27=0
x(x-9)+3(x-9)=0
(x+3)(x-9)=0
x=-3,x=9
The formula of the present value of annuity ordinary is
Pv=pmt [(1-(1+r/k)^(-kn))÷( r/k)]
Pv present value?
PMT monthly payment 425
R interest rate 0.055
K compounded monthly 12
T time 1 year
Pv=425×((1−(1+0.055÷12)^(
−12))÷(0.055÷12))
=4,951.26
To answer this question, we would use the combination formula which is
nCr, where n is the the number of objects and r is the sample.
So n would be 10, and r would be 4, since that is what we need to group.
<span>10 choose 4 is written 10C4, or C(10,4), and equals 10!/(4!(10-4)!)=10!/(4!6!)=10*9*8*7/(1*2*3*4) = 210</span>
Answer:
$11
Step-by-step explanation:
44/4 = 11
38.4/x=100/32.5
multiple both sides of the equation by x
38.4=3.07692307692*x
divide both sides by the big number to get x
38.4/(big number)=x
x=12.48
