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
Arlecino [84]
3 years ago
12

Please help me this is for a grade

Mathematics
1 answer:
IgorC [24]3 years ago
4 0

Answer:

b

Step-by-step explanation:

You might be interested in
WILL MAKE YOU BRAINLIEST! PLEASE ANSWER THIS FAST! BRAINLIEST, 5 STARS, AND A THANKS! EASY QUESTION! 6TH GRADE MATH!
katovenus [111]

Answer:

60

Step-by-step explanation:

I got it wrong because of the previous user but here is the correct answer with proof from K12!

3 0
4 years ago
The following equation involves a trigonometric equation in quadratic form. Solve the equation on the interval [0,2π).
Effectus [21]

Answer:

\dfrac{\pi}{6}, \dfrac{5\pi}{6}, \dfrac{3\pi}{2}

Step-by-step explanation:

Given the quadratic equation as:

2sin^2x+sinx=1\\OR\\2sin^2x+sinx-1=0

Let us put sinx=y for simplicity of the equation:

Now, the equation becomes:

2y^2+y-1=0

Now, let us try to solve the quadratic equation:

\Rightarrow 2y^2+2y-y-1=0\\\Rightarrow 2y(y+1)-1(y+1)=0\\\Rightarrow (2y-1)(y+1)=0\\\Rightarrow 2y-1 = 0, y+1 = 0\\\Rightarrow y = \dfrac{1}{2}, y = -1

So, the solution to the given trigonometric quadratic equation is:

sinx = \dfrac{1}{2}

and

sinx=-1

Let us try to find the values of x in the interval [0, 2\pi).

sin\theta can have a value equal to \frac{1}{2} in 1st and 2nd quadrant.

So, x can be

30^\circ, 150^\circ\\OR\\\dfrac{\pi}{6}, \dfrac{5\pi}{6}

For sinx=-1,

x = 270^\circ\ or\ \dfrac{3 \pi}{2}

So, the answer is:

\dfrac{\pi}{6}, \dfrac{5\pi}{6}, \dfrac{3\pi}{2}

7 0
3 years ago
50 points! please help!.​
Sunny_sXe [5.5K]

Answer:

Solution given:

Sin\theta_{1}=\frac{-24}{25}

\frac{opposite}{hypotenuse}=\frac{-24}{25}

equating corresponding value

opposite=-24

hypoyenuse=25

adjacent=x

By using Pythagoras law

hypotenuse²=opposite²+adjacent²

25²=(-24)²+x²

625=576+x²

x²=625-576

x=49

x=\sqrt{49}=7

In IV quadrant

Cos angle is positive

Cos\theta_{1}=\frac{adjacent}{hypotenuse}

<h3>Cos\theta_{1}=\frac{7}{25}</h3>
8 0
3 years ago
Read 2 more answers
Whats 2+2................................
Rama09 [41]

Answer:

4.0

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
A triangle has side lengths measuring 20 cm, 5 cm, and n cm. Which describes the possible values of n? 5 &lt; n &lt; 15 5 &lt; n
ehidna [41]

Answer:

15 < n < 25

Step-by-step explanation:

According to the triangle inequality theorem, any two sides lengths' sum should be greater than the third side. This also implies that to find the <em>possible length of  the 3rd side given other two sides (let two given sides be x and y)</em>, we can say that the 3rd side length will be between x+y and x-y.

Hence, we can say that <em><u>n should be between 20+5 and 20-5</u></em>.

So, 20 - 5 < n < 20 + 5, which is

15 < n < 25

<em>This is the correct answer.</em>

5 0
3 years ago
Read 2 more answers
Other questions:
  • Graph y&gt; -2(x+2)^2 +6
    12·1 answer
  • K12 5 grade math work need help WILL MARK CROWN ASAP
    8·1 answer
  • if you get you have 9 questions and you answer 8 right and one wrong that has 4 points what grade would u get
    5·1 answer
  • Team A and team B play against each other repeatedly until one team wins two games in a row or a total of three games. 1) how ma
    14·1 answer
  • A groundhog crawls out from a hole 3 feet below the surface of the ground. Joan wrote −3 feet to represent the depth from which
    9·2 answers
  • Pls respond algebra 1 super easy!! thank you!!
    7·1 answer
  • Find the complementary angle of the following <br>1)69°. 2)39°. 3)17°. 4)40°​
    5·1 answer
  • True or false: a line best fit is always an estimate and cannot be calculated
    7·2 answers
  • Clark griswold went sledding on wednesday night. Clark traveled 750 feet in 2 minutes. The line represents the relationship betw
    7·1 answer
  • No work needed! pythagorean theorem.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!