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3 years ago

Can someone tell me what 2/3 divided by 5 is it’s for a quiz.

2 answers:

8 0

It’s simple just do stay switch flip 1. Keep 2/3 2. Make division to multiplication then...3. Turn 5 into 1/5! Then you get 2/15! The question might ask you to simplify the fraction.

docker41 [41]3 years ago

7 0

Answer:2/15 hope this helps

Step-by-step explanation:

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Find the area of the polygon

Vera_Pavlovna [14]

Answer:

B) 65 square units

Step-by-step explanation:

Triangle[SUT]=4.8/2=16

Trapezoid [SUQR]=(8+6).7/2=49

16+49=65

3 0

2 years ago

Derive these identities using the addition or subtraction formulas for sine or cosine: sinacosb=(sin(a+b)+sin(a-b))/2

Sergeu [11.5K]

Answer:

The work is in the explanation.

Step-by-step explanation:

The sine addition identity is:

$\sin(a+b)=\sin(a)\cos(b)+\cos(a)\sin(b)$ .

The sine difference identity is:

$\sin(a-b)=\sin(a)\cos(b)-\cos(a)\sin(a)$ .

The cosine addition identity is:

$\cos(a+b)=\cos(a)\cos(b)-\sin(a)\sin(b)$ .

The cosine difference identity is:

$\cos(a-b)=\cos(a)\cos(b)+\sin(a)\sin(b)$ .

We need to find a way to put some or all of these together to get:

$\sin(a)\cos(b)=\frac{\sin(a+b)+\sin(a-b)}{2}$ .

So I do notice on the right hand side the $\sin(a+b)$ and the $\sin(a-b)$ .

Let's start there then.

There is a plus sign in between them so let's add those together:

$\sin(a+b)+\sin(a-b)$

$=[\sin(a+b)]+[\sin(a-b)]$

$=[\sin(a)\cos(b)+\cos(a)\sin(b)]+[\sin(a)\cos(b)-\cos(a)\sin(b)]$

There are two pairs of like terms. I will gather them together so you can see it more clearly:

$=[\sin(a)\cos(b)+\sin(a)\cos(b)]+[\cos(a)\sin(b)-\cos(a)\sin(b)]$

$=2\sin(a)\cos(b)+0$

$=2\sin(a)\cos(b)$

So this implies:

$\sin(a+b)+\sin(a-b)=2\sin(a)\cos(b)$

Divide both sides by 2:

$\frac{\sin(a+b)+\sin(a-b)}{2}=\sin(a)\cos(b)$

By the symmetric property we can write:

$\sin(a)\cos(b)=\frac{\sin(a+b)+\sin(a-b)}{2}$

3 0

3 years ago

180=2x+y which equation is used to find x

Serggg [28]

180=2x+y
180-y=2x
(180-y)/2=x

3 0

3 years ago

Miss Anderson has a hundred and twenty eight pencils left over at the end of the school year she decides to keep half of them fo

stich3 [128]

Each student will get 4 pencils

5 0

3 years ago

Read 2 more answers

How do i solve this?

Natalija [7]

Because you know the area and that the shape is a square... if the side length is "s"... to find "s" you would say...

s²=1.69

Take the root of both sides and...

s=1.3 km

8 0

3 years ago