Who has 4 projects due Friday and hasn't started but you should be
1 answer:
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Answer:
B
Step-by-step explanation:
the mean is calculated as
mean =
this year's mean = =
= 4.1
last year's mean = =
= 3.1
difference = 4.1 - 3.1 = 1
x² - 5x - 24 = 0
First, we have to solve the quadratic equation and find the two values of x that fit the equation.
There are two values of x that fit:
x₁ = (5+11)/2 = 16/2 = 8
x₂ = (5-11)/2 = -6/2 = -3
Now I can restate the original equation in terms of a product of factors, with this product being equal to zero:
(x - x₁) * (x - x₂) = 0
ANSWER (x-8) * (x+3) = 0
Now I can solve each factor by setting each one equal to zero and solving the resulting linear equations:
x - 8 = 0 or x + 3 = 0
x = 8 or x = -3
We can check that these two values are the solution to the original quadratic equation.
x² - 5x - 24 = 0
First value
8² -5*8 -24 = 0
64 - 40 -24 = 0
0 = 0 ¡Checked!
Second value
(-3)² -5(-3) -24 = 0
9 + 15 -24 = 0
0 = 0 ¡Checked!
Hope this helps!