31.75 as an improper fraction is 127/4. The mixed number fraction is 31 3/4.
Rewrite the equation:
-2x^2 - 3x + 8 = 0
2x^2 + 3x -8 =0
Where a=2, b=3 and c=-8
Then b^2 - 4ac = 3^2 - 4(2)(-8) = 9 + 64 = 73
A positive discriminant implies that the equation has two different real solutions.
Answer: the discriminant is 73, so the equation has 2 real solution
Answer:
327.25
Step-by-step explanation:
550*0.7=385
385*0.85=327.25
!!! MUST REMEMBER!!!
dont add 30% and 15% together, 15% is another discount on the price that has been marked down.
Answer:
18m³+2m²-m
Step-by-step explanation:
(5m³+3m²-2m)+(8m³-4m²+3m)=13m³-m²+m+(5m³+3m²-2m)=18m³+2m²-m
Answer:
The perimeter of a triangle is 74 inches. The second side is 2 inches more than twice the first side, and the third side is 6 inches less than three times the first side. Find the lengths of the three sides of the triangle.
Length of Sides (in inches)
Let's call the first side x.
Then, the problem says:
The second side is 2 inches more than twice the first side:
Second side = 2x+2
and the third side is 6 inches less than three times the first side:
Third side = 3x-6
The perimeter is the sum of the lengths of all sides, so in this case we get:
x+2x+2+3x-6 = 74 Add all x on left and also add 2 and -6:
6x-4 = 74 Add 4 on both sides
6x = 78 Divide both sides by 4:
x = 13 is the first side
Second side 2(13)+2
Third side 3(13)-6
Use your calculator