The width w of a rectangular swimming pool is x+4. the area a of the pool is x^3-13x+12. What is an expression for the length of the pool
If you can help I would really appreciate it
a = w * L
so
L = a / w
L = (x^3 - 13 x + 12) / ( x+4)
so divide
x^2 - 4 x + 3 maybe?
thanks bunches damon!!
1. simplify 3/5a * 1/a^2:
To simplify this expression, we can combine the two fractions by multiplying their numerators and denominators:
3/5a * 1/a^2 = (3*1)/(5a*a^2)
= 3/(5a^3)
Therefore, the simplified form of 3/5a * 1/a^2 is 3/(5a^3).
2. multiply (x-5)/(4x+8)*(12x^2+32x+16):
To multiply these two expressions, we can first factor out 4 from the denominator of the first fraction:
(x - 5)/(4x + 8) = (x - 5)/4(x + 2)
Now we can cancel out the 4 in both the numerator and denominator of the first fraction and simplify the second fraction:
(x - 5)/(4x + 8) * (12x^2 + 32x + 16) = (x - 5)/(x + 2) * (3x^2 + 8x + 4)
Next, we can factor the second fraction:
3x^2 + 8x + 4 = 3(x^2 + (8/3)x + 4/3) = 3(x + 2/3)(x + 2)
Substituting this back into the expression, we get:
(x - 5)/(x + 2) * 3(x + 2/3)(x + 2)
Now we can cancel out (x + 2) from the numerator and denominator:
(x - 5)/(x + 2) * 3(x + 2/3)(x + 2) = (x - 5) * 3(x + 2/3)
= 3x^2 - 4x - 10/3
Therefore, the product of (x-5)/(4x+8)*(12x^2+32x+16) is 3x^2 - 4x - 10/3.
bob drove 120 miles on his vacation. he drove an average of 1.2 times faster on the second 60 miles of his trip. Which expression represents the time he spent driving? let x = his speed on the first half of the trip
I apologize for the mistake. Here's the correct solution:
Let Bob's speed on the first half of the trip be x. Then, the time he spends on the first half of the trip would be:
time = distance / speed = 60/x
On the second half of the trip, Bob drives 1.2 times faster, so his speed would be:
1.2x
The time he spends on the second half of the trip would be:
time = distance / speed = 60/(1.2x) = 50/x
Therefore, the total time Bob spent driving would be:
60/x + 50/x = 110/x
So, the correct answer is A. 110/x.
thank you i have some more for you!!!
Sure, feel free to ask!
simplify x/4x+x^2
x/(4x + x^2) can be simplified by factoring the denominator:
x/(4x + x^2) = x/(x(4 + x))
Notice that x appears in both the numerator and denominator, so we can cancel them out:
x/(x(4 + x)) = 1/(4 + x)
Therefore, x/(4x + x^2) simplifies to 1/(4 + x).