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Anna11 [10]
3 years ago
14

What is the answer to this question?

Mathematics
1 answer:
Nadya [2.5K]3 years ago
7 0

Answer:

x = (i \sqrt{3}  - 1) \div 2

Step-by-step explanation:

1. Factor out the imaginary number "i" from the trinomial. This leaves you with:

x^2 + x + 1 = 0

2. From here you need to complete the square and solve for x, which should give you the above answer once simplified.

3. If you wanted to check the answer you can plug it back into the equation to see if you get 0.

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-f=-100<br> solve for f<br> f=<br> wold the answer be 1
marshall27 [118]
1 is incorrect. to solve for f, you have to get it alone, and right now you have a negative sign in your way.

you can eliminate the negative by dividing both sides by -1:

-f = -100

divide by -1 to cancel out the - in front of f

f = 100
6 0
4 years ago
The graph above shows the cost of hay. Jethro bought 9 bales of hay. Based on the graph, what is the total cost that he paid for
Scrat [10]

Answer:

b

Step-by-step explanation:

3 0
3 years ago
Find the coordinates of the point 7/10 of the way from A to B. a=(-3,-6) b=(12,4)
Artemon [7]

Answer:

The coordinates of M are x = \frac{15}{2} and y = 1.

Step-by-step explanation:

Let be A = (-3,-6) and B = (12, 4) endpoints of segment AB and M a point located 7/10 the way from A to B. Vectorially, we get this formula:

\overrightarrow {AM} = \frac{7}{10}\cdot \overrightarrow {AB}

\vec M - \vec A = \frac{7}{10}\cdot (\vec B - \vec A)

By Linear Algebra we get the location of M:

\vec M = \vec A + \frac{7}{10}\cdot (\vec B - \vec A)

\vec M = \vec A +\frac{7}{10}\cdot \vec B - \frac{7}{10}\cdot \vec A

\vec M = \frac{3}{10}\cdot \vec A + \frac{7}{10}\cdot  \vec B

If we know that \vec A = (-3,-6) and \vec B = (12, 4), then:

\vec M = \frac{3}{10}\cdot (-3,-6)+\frac{7}{10}\cdot (12,4)

\vec M = \left(-\frac{9}{10},-\frac{9}{5}  \right)+\left(\frac{42}{5} ,\frac{14}{5} \right)

\vec M =\left(-\frac{9}{10}+\frac{42}{5} ,-\frac{9}{5}+\frac{14}{5}   \right)

\vec M = \left(\frac{15}{2} ,1\right)

The coordinates of M are x = \frac{15}{2} and y = 1.

6 0
4 years ago
Need the answer to number 4
Dvinal [7]

Answer:

\sqrt{85} /2

Step-by-step explanation:

lets find hypotenuse( longest side) first

let other two samller sides be a and b and hypotenuse be c

pythagorsd theorem

a^2 + b^2 =c^2

9^2 + 2^2 =c^2

81 + 4=c^2

85 =c^2

\sqrt{85} =c

take theta as reference angle

cosec theta=hypotenuse/opposite

=\sqrt{85} / 2

5 0
3 years ago
Read 2 more answers
PLEASE SHOW ALL WORK!<br>WILL MARK BRAINLIEST!!​
svetoff [14.1K]
I’m sorry bc I don’t know how to solve all of them but
#5 is C
#3, the equation is y=4
#4, the equation is x=-6
4 0
4 years ago
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