We can factor by grouping. To do so, we multiply the leading coefficient with the constant at the end. In other words, a times c (ax^2 + bx + c).
15*-4 = -60
Now we need to split the b term into two pieces that multiply to -60 and add to 4.
-6 and 10 will work.
Now group one part of b with the 15x^2 and the other part with -4.
(15x^2 + 10x) + (-6x - 4)
Now factor both terms.
5x(3x+2) - 2(3x+2)
3x+2 is one of our factors and 5x-2 is the other.
(3x+2)(5x-2)=0
Now just find the zeros.
3x+2 = 0
3x = -2
x = -2/3
And
5x-2 = 0
5x = 2
x = 2/5
So the answer is x = -2/3 and x = 2/5
Answer:
9
Step-by-step explanation:
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Your answer is C. 2000 ft^2/h.
Answer:
$1547.62
Step-by-step explanation:
The principal Marshall invested is $4500.
The rate of interest is 6%
The compound interest formula is
We substitute P=4500,r=0.06 and t=5 to obtain:
We simplify to get:
This gives us:
The interest after 5 years is
Answer:
42.11
Step-by-step explanation:
Add all of the numbers, and then divide the total of the numbers by 9. With 9 being how many numbers are added.
