2 years ago

HELP are all three of these are either

Mathematics

1 answer:

4vir4ik [10]2 years ago

6 0

the first is no triangles, second Multiple Triangles, third Multiple Triangles

Step-by-step explanation:

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Complete the identity

spin [16.1K]

Answer: $cos(\pi-x)=-cos(x)$

Step-by-step explanation:

We need to apply the following identity:

$cos(A - B) = cos A*cos B + sinA*sin B$

Then, applying this, you know that for $cos(\pi-x)$ :

$cos(\pi-x)=cos(\pi)*cos(x)+sin(\pi)*sin(x)$

We need to remember that:

$cos(\pi)=-1$ and $sin(\pi)=0$

Therefore, we need to substitute these values into $cos(\pi-x)=cos(\pi)*cos(x)+sin(\pi)*sin(x)$ .

Then, you get:

$cos(\pi-x)=(-1)*cos(x)+0*sin(x)$

$cos(\pi-x)=-1cos(x)+0$

$cos(\pi-x)=-cos(x)$

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3 years ago

Which of the following expressions can you multiply using the FOIL Method? Check all that apply. Please Hurry. 50 points!!

Helen [10]

Answer: the answers are

(x+a)(x-b)

(3x-2)(x+4)

Step-by-step explanation: i took the test and got it right hope this helps!

8 0

2 years ago

Mark spent 135$ on his comic book collection. he just sold it online for 310$. approximately what is the profit as a percent of

V125BC [204]

Answer:

It would be B

Step-by-step explanation:

310-135=175

175/135

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2 years ago

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3 ice cream cones cost $8.25. At this rate , how much do 2 ice cream cones cost?

myrzilka [38]

Answer:

5.5

Step-by-step explanation:

8.25/3=2.75

2.75 times 2 is 5.5

4 0

2 years ago

A board game has the spinner shown at the right. On each turn, a player

dlinn [17]

Answer:

Try B Or C

Step-by-step explanation:

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2 years ago