Answer:
Step-by-step explanation:
This is a quadratic expression. Use the quadratic formula to find the roots, and then once you have the roots, write the corresponding factors.
The coefficients of this quadratic expression are a = 7, b = 5 and c = -3
The discriminant is b^2 - 4ac, or 5^ - 4(7)(-3), or 25 + 84 = 109. Because this is positive, we know that the expression has two unequal, real roots.
Using the quadratic formula, we now find these roots:
-b ± √(discriminant)
x = -------------------------------- which here is:
2a
-5 ± √109
x = -----------------
14
The factors can be found from these two roots. The first one is
-5 - √109 5 + √109
(x - ---------------- ) = (x + ---------------- )
14 14
and the second is
5 - √109
(x + ---------------- )
14
Answer:
4
Step-by-step explanation:
$15 interest to 2 years simplified would be $7.50 interest per year. $7.50 multiplied by 10 years would be $75 interest.
Answer:
Step-by-step explanation:
area=15×9+1/2×6×9
=135+27
=162 m²
Answer:
8
Step-by-step explanation:
miles/time
936÷12=
8
it's 8
