The discriminant is the term under the radical sign in the quadratic formula.
x=(-b+-(b^2-4ac)^(1/2))/(2a)
It is the b^2-4ac part. (a,b,c from the standard quadratic of form ax^2+bx+c)
In this case:
10^2-4*3*4
100-48
52
Answer:
Working together, they will finish the job in 1 hour, 25 minutes, and 42.6 seconds.
Step-by-step explanation:
Given that Ted can change an advertisement on a billboard in 5 hours, while Marie can do the same job in 2 hours, to determine how long it would take them if they worked together the following calculation must be performed:
Ted 1/5 in 1 hour
Marie 1/2 in 1 hour
1/5 + 1/2 = X
5X + 2X = 10
7X = 10
X = 10/7
X = 1 3/7
60/7 x 3 = 25.71
60 x 0.71 = 42.6
So, working together, they will finish the job in 1 hour, 25 minutes, and 42.6 seconds.
Answer:
4
Step-by-step explanation:
15x+20 = 40 +10x
x = 4
Answer:
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