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LiRa [457]
3 years ago
5

If one zero of the polynomial (a^2+9)x^2+13x+6a is the reciprocal of the other, find the value of a.​

Mathematics
1 answer:
mihalych1998 [28]3 years ago
5 0

Answer: a^2x^2+9x^2+13x+6a

Step-by-step explanation:

(a^2+9) x^2+ 13x +6a

x^2(a^2+9)+13x+6a

Expand:x^2(a^2+9): a^2 x^2+9^2

x^2 a^2 +x^2*9

a^2 x^2+9x^2

  a^2 x^2+9x^2+13x+6a

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In triangle abc, m of acb = 90, cd is perpendicular to ab , m of acd is 60. and bd is 5 cm. find ad
weeeeeb [17]

Let us draw a picture to make the things more clear.

Attached is the image.

We have been given that

\angle acd = 60 ^{\circ}

Therefore, we have

\angle dcb =90- 60= 30 ^{\circ}

Now, in triangle bcd, we have

\tan30 = \frac{5}{cd}\\
\\
\frac{1}{\sqrt 3}=\frac{5}{cd}\\
\\
cd=5\sqrt 3

Now, in triangle acb, we have

tan 60 = \frac{ad}{5\sqrt3} \\
\\
\sqrt 3=  \frac{ad}{5\sqrt3}\\
\\
ad= 5\sqrt3 \times \sqrt 3\\
\\
ad= 5\times 3\\
\\
ad=15

Thus, ad is 15 cm.


4 0
3 years ago
Anne has worn a black shirt on 6 of the last 20 days. Considering this
Stels [109]

Answer:

3

Step-by-step explanation:

Considering she wore a black shirt 6 times in 20 days will give you the statistic of 3/10. If the question is about the next 10 days then she will wear 3 black shirts. (It's also 1/2 of the original question.)

7 0
3 years ago
Which fraction has the greatest value? <br><br>5/6<br><br>1/6<br><br>-1/6<br><br>-5/6​
diamong [38]

Answer:

5/6

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
What is 2 multiplied by 0<br> will give brainliest if you can explain <br> :)
Reil [10]

Answer:

2 x 0 = 0

Any number multiplied by 0 equals 0.

Step-by-step explanation:

If multiplication tells you how many times to add a certain number, then multiplying by 0 means that you have nothing to add because 0 means nothing. So, 3 x 0 means that you are adding 3 zero, or no, times. ... You get 0 because you're still not adding anything. Nothing added to nothing is still nothing.

------------------------------------------------------------------------

I hope that this answer has helped you to understand this question, If you have any further questions, please put them below.

Have a great rest of your day/night!

6 0
3 years ago
If f(x) = 6x – 4, what is f(x) when x = 8?<br> A2<br> B16<br> C44<br> D52
makvit [3.9K]

Answer:

C. 44

Step-by-step explanation:

f(x) = 6x – 4

Plug in x = 8 into the function

f(8) =  6(8)  – 4

=48 - 4

= 44

Answer

C. 44

4 0
3 years ago
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