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mafiozo [28]
3 years ago
6

Find the zeros of f(x) = x + 7x + 9 by using the Quadratic Formula.​

Mathematics
1 answer:
REY [17]3 years ago
4 0

:))))))))))))))))))))))

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Please help me and explain how you got the answer
Rudik [331]

Answer:

D

Step-by-step explanation:

Straight line (straight angle) is always 180 degrees.

The angle adjacent to 115 and 115 degree angle would sum up to 180 (straight line).

So, that angle would be:

180 - 115 = 65

Now, we know the triangle's 2 angles: 85 (given) and 65 (found), thus we can find the third angle (leftmost):

85 + 65 + third angle = 180 [sum of 3 angles in a triangle is 180]

150 + third angle = 180

third angle = 180 - 150

third angle = 30

This third angle is adjacent to w and forms a straight line, so we can write:

third angle + w  = 180

30 + w = 180

w = 180 - 30

w = 150

Correct answer is D

5 0
3 years ago
Use the chain rule to find ∂z/∂s and ∂z/∂t. z = sin(θ) cos(ϕ), θ = st5, ϕ = s7t
8090 [49]
z=\sin\theta\cos\phi
\theta=st^5
\phi=s^7t

\dfrac{\partial z}{\partial s}=\dfrac{\partial z}{\partial\theta}\dfrac{\partial\theta}{\partial s}+\dfrac{\partial z}{\partial\phi}\dfrac{\partial\phi}{\partial s}
\dfrac{\partial z}{\partial s}=\cos\theta\cos\phi t^5-\sin\theta\sin\phi (7s^6t)
\dfrac{\partial z}{\partial s}=t^5\cos(st^5)\cos(s^7t)-7s^6t\sin(st^5)\sin(s^7t)

\dfrac{\partial z}{\partial t}=\dfrac{\partial 
z}{\partial\theta}\dfrac{\partial\theta}{\partial t}+\dfrac{\partial 
z}{\partial\phi}\dfrac{\partial\phi}{\partial t}
\dfrac{\partial z}{\partial t}=\cos\theta\cos\phi(s5t^4)-\sin\theta\sin\phi s^7
\dfrac{\partial z}{\partial t}=5st^4\cos(st^5)\cos(s^7t)-s^7\sin(st^5)\sin(s^7t)
7 0
3 years ago
In a table do you have to list the x and y coordinates in order (largest to smallest)?
Arisa [49]

Answer:

No. (maybe)

Step-by-step explanation:

For expressing the corresponding values of x and y, <em>any ordering will do</em>. It is usually convenient for the user of the table if there is some recognizable order (so that a value can be found without searching the entire table). The usual expected order is by x-value, smallest to largest.

Some problem statements may specify that the table entries be listed in order. In those cases, yes, the <em>table values must be listed as specified</em>. (This accounts for the (maybe) answer, above.)

8 0
3 years ago
4=y/8 +1 what is the answer
Lesechka [4]

4 = y/8 + 1

3 = y/8

What can we do to get 3?

Well, 24/8 equals 3.

So,

4 = 24/8 + 1

4 = 3 + 1

4.

5 0
3 years ago
Please help me.
sergey [27]
I don’t know if you are in a
6 0
3 years ago
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