3 years ago

Someone help with this?

Mathematics

1 answer:

joja [24]3 years ago

7 0

The diameter for the first question is 7

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Simplify -5+4-9r-7+13r

Orlov [11]

The answer i got was
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4 years ago

You and your friend are standing back-to-back. Your friend runs 16 feet forward and then 12 feet right. At the same time, you ru

Arte-miy333 [17]

Add 16+12 to get 28.
Add 9+12 to get 21.

Think of these as the sides of a triangle.
a^2+b^2=c^2
28^2+21^2=1225
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You threw the ball 35 feet.

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4 years ago

If f (x)=-2x–14, then f-1(x)=

Anastaziya [24]

Answer:

-(x+14)/2

Step-by-step explanation:

There is a website that automatically calculates this for you.

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3 years ago

The cost of the five most popular items at an airport gift shop include a $10.99 decorative mug, a $3.99 postcard, a $4.59 keych

agasfer [191]

Answer: step-by-step

Step-by-step explanation:

decorative mug for $10.99

$10.99 x 6.4651 = 71.051449

(6.4651 is the chinese yuan conversion from 1 dollar)

(71.051449 is the total amount of the chinese yuans needed to buy the mug)

lmk if wrong, good luck!

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2 years ago

Find the exact value of the trigonometric expression given that sin(u) = -(3/5),

GuDViN [60]

Recall that

$\cot(u+v)=\dfrac{\cos(u+v)}{\sin(u+v)}=\dfrac{\cos u\cos v-\sin u\sin v}{\sin u\cos v+\cos u\sin v}=\dfrac{\cot u\cot v-1}{\cot v+\cot u}$

Also, recall that for all $\theta$ ,

$\cos^2\theta+\sin^2\theta=1$

With $\frac{3\pi}2$ , we can expect $\cos u>0$ , and with $0$ , $\sin v>0$ . So from the above identity it follows that

$\cos u=\sqrt{1-\sin^2u}=\dfrac45\implies\cot u=\dfrac{\cos u}{\sin u}=-\dfrac43$

and

$\sin v=\sqrt{1-\cos^2v}=\dfrac8{17}\implies\cot v=\dfrac{\cos v}{\sin v}=\dfrac{15}8$

and so

$\cot(u+v)=\dfrac{-\frac43\frac{15}8-1}{\frac{15}8-\frac43}=\boxed{-\dfrac{84}{13}}$

6 0

3 years ago