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
GuDViN [60]
3 years ago
8

Someone please help me! Studying for finals and don’t understand how to complete problems like this! Thank you!

Mathematics
1 answer:
Drupady [299]3 years ago
6 0

Answer:

(d). \frac{152}{377}

Step-by-step explanation:

sin² β + cos² β = 1

cos (α + β) = cos α cos β - sin α sin β

cos α = √(1 - \frac{400}{841} ) = 21 / 29

cos β = 12 / 13

sin β = √(1 - \frac{144}{169} ) = 5 / 13

sin α = 20 / 29

cos (α + β) = \frac{21}{29} × \frac{12}{13} - \frac{20}{29} × \frac{5}{13} = \frac{152}{377}

You might be interested in
Find an equation of the line having the given slope and containing the given point.
mart [117]

Answer:

y=8x-69

Step-by-step explanation:

you would use the equation y-y1 = m (x - x1)

plug in m = 8 , y1 = 3, x1 = 9

now you have y - 3 = 8 (x-9)

distribute 8 --> y-3 = 8x - 72

add three to both sides to get y = 8x - 69

6 0
3 years ago
Xavier Designs has the logo shown below on their office door. The logo has two smaller congruent triangles that are similar to t
Alexus [3.1K]

Answer:

183.375 in2

Step-by-step explanation:

I did it on study island.

5 0
4 years ago
Approximate the amount of tip for the florist by rounding the cost and the percent gratuity to the nearest ten.
MAXImum [283]

Answer: Is 9

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
-5 and 1 which is greater in value
mash [69]

Answer:

1 is greater than -5

Step-by-step explanation:

1 is greater than -5 because 1 is a whole number while -5 is a number that isn't positive causing it to automatically be lower then 1.

6 0
4 years ago
Two linear functions are shown.
sasho [114]

Answer:

Function A has a greater initial value because the initial value for Function A is 6 and the initial vale for Function B is 3

Step-by-step explanation:

The data for Function A is presented here as follows;

\begin{array}{cc}x&y\\-1&9\\0&6\\1&3\\2&0\end{array}

The slope of the function, 'm', is given using any two points as follows;

m = (9 - 3)/((-1) - 1) = -3

The slope of the function = -3

The equation of function in point and slope form is given as follows;

y - 3 = -3·(x - 1)

The equation of Function A, is therefore, given as follows;

y = 3 - 3·x + 3 = 6 - 3·x

∴ y = 6 - 3·x

The equation of Function B is given as follows;

y = 6·x + 3

The initial value of a function is given by the y-intercept of the function, where the input variable (x-variable) is zero

The initial value, (y-intercept) of Function A, f(0) is therefore found as follows;

f(x) = y = 6 - 3·x

f(0) = 6 - 3×0 = 6

The initial value of Function A, f(0) = 6

Similarly, the initial value, (y-intercept) of Function B, f(0) is found as follows;

f(x) = y = 6·x + 3

f(0) = 6×0 + 3 = 3

The initial value of the Function B, f(0) = 3

Therefore, we have that Function A has a greater initial value than Function B

8 0
3 years ago
Other questions:
  • Which is more 11 pints or 1 gallon
    13·2 answers
  • Slope intercept form
    12·1 answer
  • The dimensions of a rectangular building are given as a length of 12x + 24 feet and a width of 20x - 10 feet. Write the expressi
    12·1 answer
  • PLEASE HELP ME NEED TO PASS.
    10·1 answer
  • a random check of 150 southwest airlines flights last month identified that 113 of them arrived on time. what "on time" percent
    7·1 answer
  • the average pumpkin weigh 6 lb the prize-winning pumpkin weighs 324 lb the prize-winning pumpkin weighs as much as how many aver
    11·1 answer
  • Using this number line, which of the following orderings is correct?
    12·1 answer
  • Help im desperatrte pls
    9·1 answer
  • In the figure below, ab is congruent to bc, and ae intersects bf at c. what is the measurement of
    13·1 answer
  • Amy needs to estimate how many students at her school like online testing. She needs to create a random sample of students. How
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!