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3 years ago

What is the product (7x2)(2x3+5)(x2-4x-9)

Mathematics

1 answer:

telo118 [61]3 years ago

6 0

Answer:

$14x^7-182x^5+35x^4-140x^3-315x^2$

Step-by-step explanation:

Find the product between $7x^2(2x^3+5)$ first.

$7x^2(2x^3) + 7x^2(5)\\14x^5 + 35x^2$

Now multiply this expression with the next expression being sure to distribute into each and every term in both parenthesis.

$(14x^5+35x^2)(x^2-4x-9)$

$14x^5(x^2) + 14x^5(-4x)+14x^5(-9) +35x^2(x^2)+35x^2(-4x)+35x^2(-9)\\\\14x^7-56x^5-126x^5+35x^4-140x^3-315x^2\\\\14x^7-182x^5+35x^4-140x^3-315x^2$

justin and madison

3 years ago

school has blocked pictures can you write the answer.

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Please help me with this question ❤️

scoundrel [369]

Answer:

The formula to find the volume of a cylinder is V = πr2h

The diameter divided by 2 is the radius. 5.5 divided by 2 is 2.75

v = π2.752 16.5

V = 391.8

The answer is 391.8

I hope this helps please mark me Brainliest! Have a nice day!

8 0

3 years ago

Jackson currently has $35 in his bank account, and he is saving $15 a week to eventually buy a new cell phone. He can represent

RSB [31]

Answer:

Answer:

1. We have our function y = 15x + 35

a) Where the x represents the numbers of weeks since each week he is saving $15, which is the independent variable.

b) Where the y represents the total money he has, which is the dependent variable.

c) the slope is 15, as x increments, the slope goes up by 15.

d) The y-intercept is 35, because when x = 0, y = 35.

2. To create the table you have to find the value of y, knowing the values of x.

Using our function, when x = 0

y = 15(0) + 35

y = 0 + 35

y = 35

Using our function, when x = 1

y = 15(1) + 35

y = 15 + 35

y = 50

Using our function, when x = 2

y = 15(2) + 35

y = 30 + 35

y = 65

Using our function, when x = 3

y = 15(3) + 35

y = 45 + 35

y = 80

Using our function, when x = 4

y = 15(4) + 35

y = 60 + 35

y = 95

Using our function, when x = 5

y = 15(5) + 35

y = 75 + 35

y = 110

Yes, the table is proportional, because for each week, the value of his money is increasing by 15.

3. To create the graph, you can put the values of the table into the graph

And the graph is not proportional because to be proportional the relationship between “x” and “y” should be constant, meaning that, if “x” changes, “y” changes by the same percentage.

In this case our function has an intercept of 35 meaning that at week 0, he has $35 saved,

after a week: $50,

after two weeks: $65,

So, although is linear, is not proportional because when you double the weeks saved, you don't double the money saved.

4 0

3 years ago

Choose the answer based on the most efficient method as presented in the lesson. If the first step in the solution of the equati

borishaifa [10]

Subtract 3. You're combining like terms.

7 0

3 years ago

Read 2 more answers

1. In the cone below, the radius is 6 meters and the height is 8 meters.

Nataly_w [17]

Answer:

301.4

Step-by-step explanation:

V=πr^2*h/3 3.14*6^2*8/3=301.4

8 0

3 years ago

the alexander family and jenkins family each used their sprinklers last summer. the water output rate for the alexander familys

Mumz [18]

Answer:
Alexanders family sprinkler used for 35.25 hours
And the Jenkins family sprinkler was used for 29.75 hours.

Step-by-step explanation:

Lets start with 2 assumptions, what if we only used the Alexander's family sprinklers, We can define X as the variable
$20x=1450$
$x= 72.5$
If we just used the Alexanders it would of took 72 hours and 30 minutes.

Now lets look at the Jenkins family sprinkler, lets define it as Y.
$25y=1450$
$y = 58$
With only the Jenkins it would of took 58 hours.

Now, if they just of shared the work equally among the two sprinklers, the Alexanders family doing 725 L and the Jenkins with the other half.
It would of took the Alexanders
$20x= 725$
$x=36.25$

Jenkins
$25y=725$
$y=29$

Making it a combined time of 65.25 hours. 15 minutes long of our 65 hour time.

Now the Jenkins sprinkler generates 5 more L than Alexanders per hour. Which means it would only take the Jenkins family 1 hours to make 25 liters but Alexanders would take $\frac{5}{4}$ hours. We know that 1 hour contains 60 minutes, which means $\frac{1}{4}$ of a hour contains 15 minutes.

So it would take Alexanders family sprinkler 15 minutes more to produce the same amount per hour that the Jenkins does.

So from this we can conclude that if the Jenkins family sprinkler was used more we can cut the extra 15 minutes off, making the answer That the

Alexanders family sprinkler used for 35.25 hours
And the Jenkins family sprinkler was used for 29.75 hours.

7 0

2 years ago