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3 years ago

X=_? please help. this assignment makes no sense and i cant find any helpful videos.

Mathematics

1 answer:

Elina [12.6K]3 years ago

7 0

See "intersecting secants theorem" (you should be able to find a variant that specifically applies to arc measures). It says that for this circle,

$30^\circ=\dfrac{x-40^\circ}2\implies x=100^\circ$

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The sum of two numbers is 13 and there difference is 5 what are the 2 numbers?

Zielflug [23.3K]

X + y = 13
x - y = 5

x = (13 - y)

(13-y) - y = 5

13 - 2y = 5
-2y = -8
y = 4

x - 4 = 5
x = 9

x=9, y = 4

4 0

3 years ago

Read 2 more answers

Given sin A = 12/13 and that angle A is in Quadrant 1,

UkoKoshka [18]

We have been given that $\text{sin}(A)=\frac{12}{13}$ and angle A is in quadrant 1. We are asked to find the exact value of $\text{cot}(A)$ in simplest radical form.

We know that sine relates opposite side of right triangle with hypotenuse.

$\text{sin}=\frac{\text{Opposite}}{\text{Hypotenuse}}$

This means that opposite side is 12 units and hypotenuse is 13 units.

We know that cotangent relates adjacent side of right triangle with adjacent side.

$\text{cot}=\frac{\text{Adjacent}}{\text{Opposite}}$

Now we will find adjacent side using Pythagoras theorem as:

$\text{Adjacent}^2=\text{Hypotenuse}^2-\text{Oppoiste}^2$

$\text{Adjacent}^2=13^2-12^2$

$\text{Adjacent}^2=169-144$

$\text{Adjacent}^2=25$

Let us take positive square root on both sides:

$\sqrt{\text{Adjacent}^2}=\sqrt{25}$

$\text{Adjacent}=5$

Therefore, adjacent side of angle A is 5 units.

$\text{cot}(A)=\frac{5}{12}$

Therefore, the exact value of cot A is $\frac{5}{12}$ .

5 0

3 years ago

Tiffany used her debit card to buy lunch for $9.72 on Wednesday. On Thursday, she deposited $9.72 back into her account. What is

Wittaler [7]

There is no overall increase or decrease in her bank account.

She spent $9.72 and later deposited the same exact amount.

So the over increase or decrease was $0.

I hope I've helped you! If you have any more questions let me know!

5 0

3 years ago

Pls help me out I might give you something

Savatey [412]

Bro I hate math tooo

8 0

2 years ago

Multiply the rational expressions<br> 3(x-4)² 5(x + 4)5<br> 8(x+4)³ 3(x-4)5

nalin [4]

1) 75x^3-300x^2-1200x+4800
Ig

7 0

1 year ago