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
mars1129 [50]
3 years ago
14

The exact value of cos 13pi/8

Mathematics
2 answers:
mars1129 [50]3 years ago
5 0
5.10508806

hope this helped!
can u plz mark me as brainiest?

Lorico [155]3 years ago
5 0

Answer:

i think its sqrt((2+sqrt2)/4)

Step-by-step explanation:

You might be interested in
Arian is making bracelets. For each bracelet, it takes 1/10 of hour to pick out materials and 1/4 hour to braid it together. How
-Dominant- [34]
Change everything into 10ths as follows:

1/10 + 2.5/10 = 3.5/10 of an hour to make one bracelet. Then change to 20ths so the numerator is a whole number.
Divide your time available by the time it takes to make one.

21
4 = 420= 15 bracelets
7 28
20

(as a whole number there was no fraction or remainder to round off)
7 0
4 years ago
i need help with number 7. its solving systems of equations by substitution. please show work!!! i need help
SIZIF [17.4K]
#7:
<span>Subtract </span>y<span> from both sides:
</span>-4x=6-y

Divide both sides by -4:

Answer:
x= -6-y/4


#7 part 2:

Add <span>y</span><span> to both sides:
</span>-5x=21+y

Divide both sides by -5:

Answer: x=-21+y/5

hope i helped!



7 0
3 years ago
A map of a park has a scale of 1 inch to 1,000 feet. Another map of the same park has a scale of 1 inch to 500 feet. Which map i
DENIUS [597]

Answer:

1 inch to five hundred feet

Its just like fractions, which ever one is lower has the greater value in ratio

3 0
3 years ago
The Unit Rate is when both units in a rate are equal to each other (ie. 5 cats : 5 dogs)
horsena [70]

Answer:

False

Step-by-step explanation:

Unit Rate Definitions Unit rate is used to compare quantities in which the second quantity is one. Common examples of unit rate would include, miles per hour earnings per hour cost per gallon.

How much of something per 1 unit of something else. Examples: • 100 cars pass by in 2 hours. The unit rate is 50 cars per hour.

3 0
3 years ago
Read 2 more answers
Annie walks 15 feet away from her house and places a mirror on the ground. She backs 4 feet away from the mirror so that she can
artcher [175]

Answer:

The house is 18.75 feet tall

Step-by-step explanation:

The triangles are similar by the AA postulate.  

We are given the length of the bottom sides of the triangles, 4 and 15 respectively.  

Thus, the ratio is 4:15

We are also given the height of Annie's eyes, which is 5 feet. The height of the side that corresponds to the house is 5, so we can set up a proportion.

\frac{4}{15}  = \frac{5}{x} \\4x = (5*15) = 75\\x = \frac{74}{4} \\x = 18.75

Thus, the house is 18.75 feet tall.

5 0
3 years ago
Other questions:
  • Expand 4x(7x-11)<br>expand 3x(7-5x)<br>Can someone help me with tge questions above?
    15·2 answers
  • You and 3 friends divide the proceeds of a garage sale equally. The garage sale earned $412. How much money did you receive?
    15·1 answer
  • Standard form of 6,32,94,000
    13·1 answer
  • Solve the equation 4\pi =w-6\pi
    6·1 answer
  • Can someone please solve this fast? thanks !
    8·1 answer
  • Which of the following equations has infinitely many real solutions? A. 6x + 1 = 6x − 1 B. 6(x − 8) = 6x − 48 C. 6x + 1 = x − 1
    5·1 answer
  • In which quadrant the values of x and y both negative.
    12·1 answer
  • A figure is translated and then rotated about the origin. Which of the following is
    11·1 answer
  • Help please and no links!!!!
    15·1 answer
  • Given that f(x) = x2 – 14x + 45 and g(x) = 2 – 9, find f(x) – g(x) and
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!