Use quadrratic equation discriminant
for
ax²+bx+c=0
if b²-4ac is the discriminant
if it is greater than 0, then it has 2 real number solutions
if it is equal to 0 then it has 1 real number solution
if it is less than 0 then it has 0 real number solutions
so
1x²+3x+j=0
b²-4ac=3²-4(1)(j)
9-4j
to have it have a real number solution, it must be greater than 0
9-4j>0
9>4j
9/4>j
j<9/4 is the solution area
Michael is 31 years old
John is 14 years old
31+14= 45
In 4 years the age will equal 49
Answer:
The answer is y= 100 +15x
Step-by-step explanation:
You start with a service fee of $100
$15 per hour
x because the amount of hours can vary
y which is the total cost
y= 100+ 15x
Answer:
x + 50° + 70° = 180°
or, x + 120° = 180°
or, x = 180° - 120°
•°• x = 60°
Step-by-step explanation:
x + 50° + 70° = 180° ( Due to Straight line )
