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
riadik2000 [5.3K]
3 years ago
13

Find x from given equations sin30 + 2 cot^2 30 + x cos^2 30= 8+ tan^2 45 + cos 60​

Mathematics
1 answer:
julia-pushkina [17]3 years ago
4 0

Answer

1/2+2×(sqrt3)^2+x.(sqrt3/2)^2=8+1^2+1/2

1/2+2×3+x.3/4=8+1+1/2

1/2-1/2+6+x.3/4=9

x.3/4=9-6

x.3×4=3

x.3=3×4

x.3=12

x=12/3

x=4.

so, the value of x is 4.

hope it helps you.

You might be interested in
Find the interval(s) over which the function is decreasing
son4ous [18]

Answer : (0,3) U  (3, ∞)

We need to find  the interval(s) over which the function is decreasing

We look at the intervals of x  where the graph is decreasing

Decreasing interval of the graph is the part where the graph goes down

We look at the part where the graph changes direction

In the middle  inverted U shaped graph , the graph changes direction and start decreasing at x=0

the graph is decreasing till x=3

so first decreasing interval is x=0  to 3. we write it as (0,3)

After x=3 the graph starts decreasing and it goes to infinity

So the second decreasing interval is 3  to infinity . We write it as (3, ∞)

Now combine both intervals by a 'U' union

(0,3) U  (3, ∞)

7 0
3 years ago
145 is what percent of 620
Oksanka [162]

Hello There!

145 is 23.39% of 620

<u><em>HOW TO SOLVE</em></u>

<u><em></em></u>

<u><em>Equation: Y = P% * X</em></u>

<u><em>We need to solve our equation for "P"</em></u>

<u><em>P% = Y/X</em></u>

<u><em>P% = 145/620</em></u>

<u><em>p = 0.2339</em></u>

<u><em></em></u>

<u><em></em></u>

<u><em>Convert decimal to percent:</em></u>

<u><em>Percent = 0.2339 * 100 = 23.39%</em></u>

4 0
3 years ago
A rectangle has a length of 9.00 inches and a width of 4.25 inches. What is the area in square inches? Round to the correct sign
ale4655 [162]
Area of rectangle = length x breadth
= 9 x 4.25
= 38.25
= 38 sq. inches (After rounding)
Hope this helps you!
5 0
3 years ago
*ੈ✩‧₊˚
elena-s [515]
Answer is 44-2/5

Step by step. I did a print screen showing how we can use cancellation with the 3 and 9 so the numbers are smaller. Then we multiplied across to get 222/5.

Divide 222 by 5 = 44-4/10, simplified to 44-2/5.

5 0
1 year ago
Marley has read 112.5 pages of a book. By the end of today, she plans to have read at least a total of 360 pages. If she reads 4
e-lub [12.9K]
She will need 5 and a half hours. First step is to do 360-112.5 the pgs she read and her goal. then you'll get 247.5. To find how many hours you need to find the unit rate. so 247.5 divided by 45 is 5.5 hours. 

hope this helped. can u mark me as the brainiest answer
6 0
3 years ago
Other questions:
  • Ashley, tom, and pablo sent a total of 90 text messages over their cell phones during the weekend. pablo sent 6 fewer messages t
    8·1 answer
  • 6÷x (1+2)=1 please tell me how to work this out
    9·1 answer
  • Quadrilateral ABCD is a rectangle. BD = 6x - 14 and AC = 8x - 20. What is BD?
    12·1 answer
  • Z1 and Z2 are complementary. The mZ1 = 25°. What is the mZ2?​
    9·1 answer
  • The coordinates of the vertices of a triangle
    7·2 answers
  • Write the slope intercept equation of a line that has a 3 slope of 5 &amp; y-intercept of (0, –4). y =​
    10·1 answer
  • Two forces, one of 120 pounds and the other of 200 pounds, act on the same
    6·1 answer
  • What is the smallest number which should be added to 13811 to make them divisible by 11​
    15·1 answer
  • Nick wanted to determine the length of one blade of a windmill. He stood at a point on the ground 440 feet from the windmill's b
    13·1 answer
  • Solve each of the following for the indicated variable.a. 9 − 6 = 54 for yb. = 2 + 2 for l
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!