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Ket [755]
3 years ago
13

Select the correct product. (x 2 + 6x + 9)(3x - 1)

Mathematics
2 answers:
Lorico [155]3 years ago
7 0
I got answer choice A for this one.
CaHeK987 [17]3 years ago
4 0
The answer is the first option.. lets Start this correctly, we do this by doing distributive property, lets multiply x^2 times 3x and we will get 3x^3 that is our first digit and as we can see they all start the same so we can't eliminate one just yet.. Lets go with the second one, x^2 times -1 and we will get -1x^2 now remember that we ave to find the next term and subtract or add it to this one in order to find the next number in the line... so lets go ahead and multiply 6x times 3x and get 18x^2 now lets add that to -1x^2 and we will get 17x^2, now lets see if we can eliminate one now.. as a matter of fact if you take notice knowing that our next term is positive 17x^2 we can know that practically all are eliminated execpt the first one.. this is because the second one is 17x^2 but it negavtive and ours is positive so that can't be, and the others are 19 and our number is 17 so those won't fit either but lets keep going to make sure. lets multiply 6x times -1 and get -6x, now 9 times 3x to get 27x lets add that one and -6x to get 21x that is our third number. finally multiply 9 times -9 and you will get -9 this is your final number... 

So your answer is the first option hope this helps
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I need help on this question
rosijanka [135]

Answer:

11. Volume = 2181.2mm^3

12. Surface Area = 1204.49mm^2

Step-by-step explanation:

We first need to find the hypotenuse side of the triangle using the Pythagorean theorem:

a^2+b^2 = c^2

13.3^2+20.5^2 = c^2

176.89+420.25 = c^2

597.14 = c^2

24.44 = c

Now we can find the volume using the formula:

V = 1/4(16)sqrt-13.3^4+2(13.3*20.5)^2+2(13.3*24.44)^2

-20.5^4+2(20.5*24.44)^2-24.44^4

V = 2181.2mm^3

To find the surface area using the surface area formula:

A = (13.3*16)+(20.5*16)+(24.44*16)+1/2sqrt

13.3^4+2(13.3*20.5)^2+2(13.3*24.44)^2

-20.5^4+2(20.5*24.44)^2-24.44^4

A = 1204.49mm^2

7 0
3 years ago
Sophia Thompson is 12 years old. Her mother is 5 years less than four times as old as Sophia. How old is mrs. Thompson? Please e
Ugo [173]
Sophia is 12. Four times that is 48. If her mother is 5 years less than this, she is 43.

(12 x 4) - 5 = 43
7 0
3 years ago
X + 3 &lt; 15<br> what is 4
professor190 [17]

Answer:

X = > 12 because 15 - 3 = 12 and if X was more than 12 it would be wrong.

Step-by-step explanation:

6 0
2 years ago
Simplify the expression 7t +3- 2 t
Ivenika [448]

Answer:

5t+3

Step-by-step explanation:

1 Collect like terms.

(7t-2t)+3

2 Simplify.

5t+3

7 0
1 year ago
Read 2 more answers
Find the distance between points A and B, round the answer to the nearest hundredth
gizmo_the_mogwai [7]
It might be 5 units

Not totally sure
4 0
2 years ago
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