1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kirza4 [7]
3 years ago
9

Solve g(-1)=x^2-5x+2

Mathematics
1 answer:
olga55 [171]3 years ago
5 0

Answer:

x = 5/2 + sqrt(17)/2 or x = 5/2 - sqrt(17)/2

Step-by-step explanation:

Solve for x:

x^2 - 5 x + 2 = 0

Subtract 2 from both sides:

x^2 - 5 x = -2

Add 25/4 to both sides:

x^2 - 5 x + 25/4 = 17/4

Write the left hand side as a square:

(x - 5/2)^2 = 17/4

Take the square root of both sides:

x - 5/2 = sqrt(17)/2 or x - 5/2 = -sqrt(17)/2

Add 5/2 to both sides:

x = 5/2 + sqrt(17)/2 or x - 5/2 = -sqrt(17)/2

Add 5/2 to both sides:

Answer:  x = 5/2 + sqrt(17)/2 or x = 5/2 - sqrt(17)/2

You might be interested in
10+10= hhihihhhiihihihih
svetoff [14.1K]

Answer:

10+10=1010

Step-by-step explanation:

brainliest?

4 0
3 years ago
Read 2 more answers
Please help ! Easy 7th grade work ! I’ll give brainliest
spin [16.1K]

Answer:

for the first one...      24

Step-by-step explanation:

im in 7th grade pls mark brainliest <3

5 0
3 years ago
HELPP!!! Will give Brainliest!!!
Pavel [41]

the local maximum is at x = -2.2 and has a value of 72.576


6 0
3 years ago
5. A sum of money is divided among Ethan, Jun Wei
anastassius [24]

Answer:

$450

Step-by-step explanation:

Let E be the amount of money Ethan starts with, J be the amount Jun Wei starts with, and R be the amount Raj starts with. Let M be the total amount of money to start with.

To start:

E:J:R = 5:6:9

This means Ethan has 5/20 of M, the money to start with. This reduces to 1/4 of M.

Afterwards:

(E-50):J:R = 3:4:6

This means Ethan has 3/13 of the remaining money (which is M-50!) after giving up 50. So

E = (M/4), or 4E = M

and

(E - 50) = 3/13 * (M - 50)

We know 4E = M, so we can substitute that in:

(E - 50) = 3/13 * (4E - 50)E - 50 = (12/13)E - 150/13E - 650/13 = (12/13)E - 150/13(1/13)E = 500/13E = 500

That's how much money Ethan had to start with. But we're asked how much he has AFTER giving $50 away, so that's $450.

3 0
3 years ago
PLEASE HELP ME I'M GIVING 20PTS AND MARKING BRAINLIEST!!!!
pishuonlain [190]

Using a trigonometric identity, it is found that the values of the cosine and the tangent of the angle are given by:

  • \cos{\theta} = \pm \frac{2\sqrt{2}}{3}
  • \tan{\theta} = \pm \frac{\sqrt{2}}{4}

<h3>What is the trigonometric identity using in this problem?</h3>

The identity that relates the sine squared and the cosine squared of the angle, as follows:

\sin^{2}{\theta} + \cos^{2}{\theta} = 1

In this problem, we have that the sine is given by:

\sin{\theta} = \frac{1}{3}

Hence, applying the identity, the cosine is given as follows:

\cos^2{\theta} = 1 - \sin^2{\theta}

\cos^2{\theta} = 1 - \left(\frac{1}{3}\right)^2

\cos^2{\theta} = 1 - \frac{1}{9}

\cos^2{\theta} = \frac{8}{9}

\cos{\theta} = \pm \sqrt{\frac{8}{9}}

\cos{\theta} = \pm \frac{2\sqrt{2}}{3}

The tangent is given by the sine divided by the cosine, hence:

\tan{\theta} = \frac{\sin{\theta}}{\cos{\theta}}

\tan{\theta} = \frac{\frac{1}{3}}{\pm \frac{2\sqrt{2}}{3}}

\tan{\theta} = \pm \frac{1}{2\sqrt{2}} \times \frac{\sqrt{2}}{\sqrt{2}}

\tan{\theta} = \pm \frac{\sqrt{2}}{4}

More can be learned about trigonometric identities at brainly.com/question/24496175

#SPJ1

5 0
2 years ago
Other questions:
  • The number of units sold when profit stops increasing and starts decreasing. (round to the nearest whole number if necessary.
    15·1 answer
  • 12=6x+3y solve for y
    10·1 answer
  • What is 7/10 × 4/21. Make sure to show your work.
    15·1 answer
  • The North Pole is in the middle of the ocean. A person at sea level at the North Pole is at an elevation of 3,949 miles from the
    11·1 answer
  • Gary surveys all of his class for a project
    10·1 answer
  • Which two decimals have the same value as 7/10 ​
    15·2 answers
  • The roots of the function f(x)=x^2-2x-3 are shown. what’s the missing number
    5·1 answer
  • Find arc YW<br>Please help<br>​
    11·2 answers
  • PLEASE HELP!!! WORTH 20 POINTS!
    15·1 answer
  • 1. Given f(x)= 3x -4 and g(x)=-2x + 7 evaluate:<br> (g ∘ f) (6)
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!