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
saveliy_v [14]
3 years ago
14

Please help me with these two, and please explain how to do it. Thank you.

Mathematics
1 answer:
pychu [463]3 years ago
3 0

Answer:

So for number 1 we can use the trigonometry to find out the radius/diameter of the circle then we can use the formula to get the area then we divide by 2 because its half of a circle. So we can get that the cos(68) = 7/x x being the diameter. We then can multiply it by x on both sides. That gives xcos(68) = 7. So then we can do the inverse and get x = cos^-1(68)*7. That gives us approx 18.686 as the diameter, we can divide by 2 and get 9.343. So then we can use the formula which is A = pi*r^2. So that gives us 87.291*pi 274.233. Then if we divide by 2 we get 137.12 that is the answer to first question.

I was able to simplify it into the factored form for number 2.(x-1)^2+(y-2)^2=sqrt(17))^2. Therefore using the circle equation formula we can determine that the center is 1,2. The radius is sqrt(17). We square it and we get 17. So that means that the area is pi*17. Then we get 51.407 as the area.

<h2><u>Answer to 1: 137.12 round to tenth and you get 137.1</u></h2><h2><u></u></h2><h2><u>Answer to 2: </u></h2><h2><u>Center: 1,2 </u></h2><h2><u>Area: 51.407.</u></h2>
You might be interested in
Please help me, 6th grade math
Stells [14]

Answer:

Mean: 3.2 Median: 3.2 Mode:3.1 Range:0.5

Step-by-step explanation:

Easy.

5 0
3 years ago
» What is the combined length of all the buttons longer than 1 inch​
GrogVix [38]

Answer:

how many buttons there are

Step-by-step explanation:

yo have to have a certain number of buttons

4 0
3 years ago
The complementary angle of 45
Licemer1 [7]

Answer:

45°

Step-by-step explanation:

Complementary angles sum to 90°, thus

90° - 45° = 45° ← is the complement of 45°

4 0
3 years ago
Jim had some dimes, quarters, and nickels. First, he counted only the dimes and quarters and found that he had 9 coins. Then, he
Olegator [25]

Answer:

$1.90

Step-by-step explanation:

Represent the numbers of nickels, dimes and quarters by n, d and q.

Then: d + q = 9, or q = 9 - d.

Also, n + d = 10

Lastly, n + d + q = 15.

Let's substitute 9 - d for q in the equation immediately above:

n + d + (9 - d) = 15, or n + 9 = 15.  Then n must be 6.

In summary, Jim has 6 nickels, (10 - 6) dimes and (9 - 4) quarters, or:

                                    6 nickels, 4 dimes and 5 quarters

Thus, he has 5($0.05) + 4($0.10) + 5($0.25), or

                         $0.25   +   $0.40   + $1.25, or          $1.90

7 0
3 years ago
Simplify the expression.
Marizza181 [45]
\bf \textit{Cofunction Identities}&#10;\\ \quad \\&#10;sin\left(\frac{\pi}{2}-{{ \theta}}\right)=cos({{ \theta}})\qquad &#10;\boxed{cos\left(\frac{\pi}{2}-{{ \theta}}\right)=sin({{ \theta}})}&#10;\\ \quad \\ \quad \\&#10;tan\left(\frac{\pi}{2}-{{ \theta}}\right)=cot({{ \theta}})\qquad &#10;cot\left(\frac{\pi}{2}-{{ \theta}}\right)=tan({{ \theta}})&#10;\\ \quad \\ \quad \\&#10;sec\left(\frac{\pi}{2}-{{ \theta}}\right)=csc({{ \theta}})\qquad &#10;csc\left(\frac{\pi}{2}-{{ \theta}}\right)=sec({{ \theta}})

\bf \\\\&#10;-------------------------------\\\\&#10;sin^2(\theta)+cos^2(\theta)=1\implies cos^2(\theta)=1-sin^2(\theta )&#10;\\\\\\&#10;\boxed{cos(\theta )=\sqrt{1-sin^2(\theta )}}

\bf \\\\&#10;-------------------------------\\\\&#10;\cfrac{cos^2\left(\frac{\pi }{2}-x  \right)}{\sqrt{1-sin^2(x)}}\implies \cfrac{\left[ cos\left(\frac{\pi }{2}-x    \right)\right]^2}{cos(x)}\implies \cfrac{[sin(x)]^2}{cos(x)}\implies \cfrac{sin(x)sin(x)}{cos(x)}&#10;\\\\\\&#10;sin(x)\cdot \cfrac{sin(x)}{cos(x)}\implies sin(x)tan(x)
6 0
3 years ago
Other questions:
  • 100pts: Prove, for all positive integers n, that (n! + 1) is not divisible by any positive integers less than or equal to n.
    5·2 answers
  • Solve for all values of x by factoring. x^2-1=0
    10·1 answer
  • In a field there are cows, birds, and spiders. Spiders have 4 eyes and 8 legs each. In the field there are 20 eyes and 30 legs.
    10·1 answer
  • PLEASE SOMEONE HELP ME
    5·1 answer
  • Can someone please help me with this one please
    11·1 answer
  • Can somebody help me ?
    11·2 answers
  • Look at the picture please hell
    14·1 answer
  • 9 + 4[(4 + 2)3 - (32 + 2)]
    6·2 answers
  • What is the approximate volume of the cylinder? Use 3.14 for
    5·1 answer
  • #72 i will give brainliest to the best answer!​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!