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leva [86]
3 years ago
12

Solve. 6x cubed=4x to the fourth+3x squared-7x

Mathematics
1 answer:
irinina [24]3 years ago
8 0

Answer: 4x²-9

Step-by-step explanation:

Step 1 : Equation at the end of step 1 : 22x2 - 9.

Step 2 : Trying to factor as a Difference of Squares : 2.1 Factoring: 4x2-9. Check : 4 is the square of 2. Check : 9 is the square of 3. Check : x2 is the square of x1 Factorization is : (2x + 3) • (2x - 3)

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Kay earns $78,400 per year. She takes a standard deduction of $5,700 and pays tax at a 21% rate. What is the amount of Kay's inc
Alex787 [66]

Answer:

$15,267

Step-by-step explanation:

Kay earns $78,400 per year and gets a standard deduction of $5,700.

Her taxable income is amount of money that she can pay tax on and that is:

Income - Standard Deduction

= $78,400 - $5,700 = $72,700

She pays tax at a 21% rate, hence, her income tax is:

\frac{21}{100} * 72,700

= $15,267

Her income tax is $15,267.

6 0
3 years ago
There are 108 students in the book club. Last year, each student read 35 books. How many books did the students read altogether
Shkiper50 [21]

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8 0
3 years ago
There were 10 bunches of roses and tulips. Each bunch had 5 of the same flowers. There were 2 more bunches of tulips than roses.
Leviafan [203]

Answer:

I think the answer is 12 (sorry if i misunderstood the question)

Step-by-step explanation:

Because if there are 10 things of roses and tulips and then 2 more tulips are added in the question in total thats 12.... 10+2=12

6 0
3 years ago
5 + w + 21<br> What is the answer helped me please
Anna35 [415]

Answer:

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Step-by-step explanation:

6 0
4 years ago
element x is a radioactive isotope such that every 32 years, its mass decreases by half. given that the initial mass of the samp
VashaNatasha [74]

Answer:

the answer is 31.9 years

Step-by-step explanation:

initial mass,  M_{0}  = 150 gram

half life, t_{half\hspace{0.1cm}life} = 32 years

new mass = half of initial mass = M = 0.5M_{0}

formula , M = M_{0} e^{\frac{\ln\frac{1}{2}}{t_{half} }\times x } where x is the number of years required.

therefore 0.5 M_{0}  = M_{0} e^{\frac{\ln\frac{1}{2}}{t_{half} }\times x } = M_{0} e^{-0.0217x}

therefore -0.0217 x = \ln{0.5} = -0.693  

therefore x = \frac{-0.693}{-0.0217} = 31.942

8 0
3 years ago
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