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
alexira [117]
3 years ago
15

If cos x= sin(20 + x)° and 0° < x < 90°, the value of xis

Mathematics
1 answer:
ruslelena [56]3 years ago
4 0

Answer:

draw a right angle triangle

Step-by-step explanation:

Let one of the angles be A  

cos A = sin (90-A)  

90 - x - 20 = x  

2x = 70  

x = 35 degrees

You might be interested in
Please help! I keep on getting the wrong answer!
valentina_108 [34]

Answer:

CODE: 1977.98

Step-by-step explanation:

A.

(To get the closest answer, round the circumference to the nearest ten thousandth.)

C = 2(3.14)r                      Circumference formula: C = 2πr

C = 2(3.14)(3)

C = 18.84

B.

A = (3.14)r²

A = (3.14)(3)²

A = (3.14)(9)

A ≈ 28.26

C. (It's asking for the circumference.)

C = 2(3.14)r

C = 2(3.14)(58)

C ≈ 364.24

D. (It's a linear pair, which is 180 degrees.)

4x + 2x = 180

6x = 180

x = 30

m∠ABD = 4x

m∠ABD = 4(30)

m∠ABD = 120°

E. (∠GHI & ∠JHK are vertical angles, so they are congruent.)

x + 7 = 3x - 21

28 = 2x

14 = x

F. (x = 14)

m∠JHK = 3x - 21

m∠JHK = 3(14) - 21

m∠JHK = 42 - 21

m∠JHK = 21°

G. (Supplementary - two angles that add up to 180 degrees.)

180 - 84

= 96°

CODE: E(C - D) - F(G - B) - A

CODE: 14(364.24 - 120) - 21(96 - 28.26) - 18.84

CODE: 14(244.24) - 21(67.74) - 18.84

CODE: 3419.36 - 1422.54 - 18.84

CODE: 1977.98

8 0
2 years ago
Jeremy will roll a number cube,numbered 1-6,twice.What is the probability of rolling an even number,then the number 3
gogolik [260]
I believe the answer is 1/12.
6 0
3 years ago
Martha is 25 years old, owns her car, but walks to work. Her collision
Shalnov [3]

Answer:B

Step-by-step explanation:

3 0
3 years ago
A student would like to estimate the proportion of the senior class that plans to attend prom this year. The student goes to the
Paul [167]

Answer:

No, although the random and large counts conditions are met, the 10% condition is not met.

Step-by-step explanation:

The random condition is met because the student selects a random sample of 50 seniors. The large counts condition is met because there are 38 expected successes and 12 expected failures, which are both at least 10. The 10% condition is not met because n = 50 is not less than 10% of the size of the population (N = 274 seniors).

3 0
3 years ago
a collection of coins consist of nickels, dimes, and quarters. there are 3 fewer quarters than nickels and six more dimes than q
ZanzabumX [31]
There are 12 Nickels, 9 Quarters, and 15 Dimes.
7 0
3 years ago
Other questions:
  • Suppose a basketball player makes 3/4 of a foul shot. How would you conduct a simulation that models the results of the twelve s
    12·2 answers
  • "Find an integer, x, such that 5, 10, and x represent the lengths of the sides of an acute triangle.
    13·2 answers
  • Find an equation of the line perpendicular to the graph of l4x-y 8 that passing through the point at (-2, 5)
    8·1 answer
  • What is the unit rate, expressed in kilometers per minute?
    14·2 answers
  • If x+y = 12 and x−y = 8, what is the value of x2+y2? (A) 20 (B) 24 (C) 100 (D) 104 (E) 208
    6·1 answer
  • Please answer these for me &lt;3
    15·1 answer
  • Describe in detail how you would create a number line with the following points: 4, 1.25, the opposite of 3, and – (–2fraction o
    9·1 answer
  • HEY CAN ANYONE PLS ANSWER DIS MATH PROBLEM!!
    10·1 answer
  • A triangle with vertices A(0,0), B(6,0), and C(0,9) is rotated 360 about the y-axis. What is the volume of the figure?
    7·1 answer
  • Find the domain and range with a vertex of (1,-2)
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!