The error is in the first step. It should be (+8 plus or minus the square root of the quantity eight squared minus four times one times seven ). This is because "b" is -8 so -b is -(-8) = +8
Answer: 40.45 or 40 9/20
Step-by-step explanation:
2 miles * 7 days = 14
3/5 miles * 7 days = 4.2
5 miles * 4 days = 20
3/4 miles * 4 days = 2.25
then you add those together, and thus 40.45
Answer:Solve for the first variable in one of the equations, then substitute the result into the other equation.
Point Form:
(
−7
5
,
8
5
)
Equation Form:
x
=
−
7
5
,
y
=
8
5
Step-by-step explanation:
Answer:-1.38888888889
Step-by-step explanation: