Answer:185.87
Step-by-step explanation:
Explanation:
simple interest (SI) can be calculated using the formula
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
∣
∣
∣
2
2
S
I
=
P
R
T
100
2
2
∣
∣
∣
−−−−−−−−−−−−−−−
where P is the Principal, that is amount of money
R is the rate of interest
T is time in years
here P
=
$
2560
,
R
=
5
1
8
=
41
8
and T
=
17
12
years
⇒
S
I
=
2560
×
41
8
×
17
12
100
⇒
S
I
=
2560
×
41
×
17
100
×
8
×
12
⇒
S
I
≈
$
185.87
to nearest cent
#420
because 70x4=420 within 300 and 500 and is greater than 400 which is a multiple of 100
Replace all the x's in the equation with -5. f(5)=(5)2-5+2. > 10-5+2 > 5+2= 7
The Answer is 7
Answer:
Step-by-step explanation:
A 2nd order polynomial such as this one will have 2 roots; a 3rd order polynomial 3 roots, and so on.
The quadratic formula is one of the faster ways (in this situation, at least) in which to find the roots. From 2x^2 + 4x + 7 we get a = 2, b = 4 and c = 7.
Then the discriminant is b^2 - 4ac, or, here, 4^2 - 4(2)(7), or -40. Because the discriminant is negative, we know that the roots will be complex and unequal.
Using the quadratic formula:
-4 ±√[-40] -4 ± 2i√10
x = ------------------ = ------------------
4 4
-2 ± i√10
Thus, the roots are x = ------------------
2
