All categories

3 years ago

(4x-5)^3 - (x^2 + 4x+1)(4x-3)=?

Mathematics

2 answers:

neonofarm [45]3 years ago

8 0

Answer:

64x^3-241x^2+296x-125

Step-by-step explanation:

Alex777 [14]3 years ago

8 0

Answer:

60x^3-253x^2+308x-122

Step-by-step explanation:

(4x-5)^3-(x^2+4x+1)(4x-3)

=64x^3-240x^2+300x-125-(x^2+4x+1)(4x-3)

=(4x)^3-3(4x)^2*5+3*4x*5^2-5^3

=64x^3-240x^2+300x-125

=-(4x^3+13x^2-8x-3)

=-(4x^3)-(13x^2)-(-8x)-(-3)

=-4x^3-13x^2+8x+3

=64x^3-240x^2+300x-125-4x^3-13x^2+8x+3

=64x^3-4x^3-240x^2-13x^2+300x+8x-125+3

=64x^3-4x^3-253x^2+300x+8x-125+3

=60x^3-253x^2+300x+8x-125+3

=60x^3-253x^2+308x-125+3

=60x^3-253x^2+308x-122

So the Answer is 60x^3-253x^2+308x-122.

God Bless, Hope it helps!!!!!!!

You might be interested in

An angle measure is 72.3 degrees. What is the measure of its complement? (I already tried 17.7 and that’s not correct).

Makovka662 [10]

Answer:

I got 17.7°

Step-by-step explanation:

Since a complimentary angle adds up to 90 degrees, this would be the right answer... does it require a degree symbol?

6 0

3 years ago

There are 13 vans and 12 buses with 767 students at high school. And at high school B there are 8 vans and 6 buses with 400 stud

eimsori [14]

U have to divide to get the answer

7 0

3 years ago

You are planning a survey of starting salaries for recent computer science majors. In a recent survey by the National Associatio

nydimaria [60]

Answer:

A sample size of 554 is needed.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.025 = 0.975$ , so Z = 1.96.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

Standard deviation is known to be $12,000

This means that $\sigma = 12000$

What sample size do you need to have a margin of error equal to $1000, with 95% confidence?

This is n for which M = 1000. So

$M = z\frac{\sigma}{\sqrt{n}}$

$1000 = 1.96\frac{12000}{\sqrt{n}}$

$1000\sqrt{n} = 1.96*12$

Dividing both sides by 1000:

$\sqrt{n} = 1.96*12$

$(\sqrt{n})^2 = (1.96*12)^2$

$n = 553.2$

Rounding up:

A sample size of 554 is needed.

5 0

2 years ago

9. Lisa bought h shares of Home Depot stock for x dollars per share. She sold all of the

aalyn [17]

Answer:

(hy)-(hx)=P

Step-by-step explanation: to get the total price of stock you multiply the cost of one share by how many shares were bought. After being sold years later they made a profit, you must subtract the total cost from this profit to find the total profit.

8 0

3 years ago

Convert fraction to decimal 16/10

m_a_m_a [10]

Answer:

1.6

Step-by-step explanation:

16/10 = 1.6

5 0

3 years ago