The value of a dimes are 10 cents
<span>x - 8y = 46.5
x - 13y = 39.0
subtract the equations to solve for y
5 y = 46.5 - 39
y = 1.5 so he saves 1.5 seconds per step he runs.
sub in y to solve for x
x - 8 (1.5) = 46.5
x - 12 = 46.5
x = 58.5 seconds </span>
Answer:
77.18%
Step-by-step explanation:
115:149*100 =
(115*100):149 =
11500:149 = 77.18
Answer:66 dollars
Step-by-step explanation:110 - 44 = 66
Answer:
If f(1)=0 then 1 is a root and (x-1) is a factor of f(x). divide f(x) by (x-1). you now have a quadratic. Find its roots by methods you know.
actually this factors by grouping:
f(x)=x³+3x²-x-3
= x²(x+3)-1(x+3)
=(x+3)(x²-1)
=(x+3)(x-1)(x+1) // difference of squares
By zero product property roots are
-3, -1, 1
