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ExtremeBDS [4]
3 years ago
12

Find the zeros of polynomial function and solve polynomials equations. f(x)=72x^4-9x

Mathematics
1 answer:
kipiarov [429]3 years ago
8 0
X= 0, 1/2
Solve : 9x • (2x-1)•(4x^2+2x+1)
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Cammie can mow 1/2 acre in 25 minutes. If her rate is constant, Cammie says she can mow 1 1/4 acres in one hour. Is Cammie corre
Sergeu [11.5K]

Answer: No, Cammie is not correct. She can mow  1\frac{1}{5}\ acres in one hour (See explanation).

Step-by-step explanation:

Convert the mixed number to an impoper fraction:

1. Multiply the whole number part by the denominator of the fraction and add the product to the numerator.

2. The denominator does not change.

Then:

1\frac{1}{4}=\frac{(1*4)+1}{4}=\frac{5}{4}

Let be "x" the acres Cammie can mow in one hour.

You know that she can mow \frac{1}{2}\ acre in 25 minutes, then you can set up the following proportion (Remember that 1 hour has 60 minutes):

\frac{\frac{1}{2}}{25}=\frac{x}{60}

Solving for "x", you get:

\frac{\frac{1}{2}}{25}=\frac{x}{60}\\\\(60)(\frac{1}{50})=x\\\\x=\frac{6}{5}

Convert from improper fraction to mixed number:

1. When you divide 6 by 5, the quotient is 1. This will be the whole number part.

2. The remainder is 1. This will be the numerator.

3. The denominator does not change.

Then:

x=1\frac{1}{5}

Therefore, she can mow  1\frac{1}{5}\ acres in one hour.

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3 years ago
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AlexFokin [52]

Answer:

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Step-by-step explanation:

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3 years ago
Vida correctly answered 18 of a 20 item test. Express her score in percent.
DerKrebs [107]
Her score in percent is 90%
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A new car is for lease for $192 per month for 36 months, with a down payment of $358. the lease allows for 12,000 miles per year
Natalija [7]

Answer:

2 733.25 + 7270 = 10 003.25

Step-by-step explanation:

192 * 36 = 6 912 +358 = 7 270

45425 - 36000 ( allowed miles for 3 years )

9 425 * 0.29 = 2 733.25

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2 years ago
Rewrite the expression with a rational exponent as a radical expression.
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There’s no way anyone could answer this
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