Hmmm lemme do the first one only

$\bf \textit{equation of a circle}\\\\ 
(x- h)^2+(y- k)^2= r^2
\qquad 
center~~(\stackrel{5}{ h},\stackrel{3}{ k})\qquad \qquad 
radius=\stackrel{2}{ r}
\\\\\\
(x-5)^2+(y-3)^2=2^2\implies (x-5)^2+(y-3)^2=4$

4 0

2 years ago

In ΔWXY, the measure of ∠Y=90°, XW = 85, WY = 84, and YX = 13. What is the value of the cosine of ∠W to the nearest hundredth?

IgorLugansk [536]

Answer: 0.99

Step-by-step explanation:

SOH CAH TOA

CAH: cosine = adjacent/hypotenuse

Cosine of angle w = 84/85 = 0.98823 ≈ 0.99

Angle Y is 90 degrees, meaning it's a right triangle. Therefore angle W is the top/tip of a triangle, while X is the angle next to Y. If you plug in the information afterwards and follow the trigonometry rule (SOH CAH TOA) you will find your answer.

4 0

3 years ago

Two Number are in ratio 2:3 ,if their l.c.m is 48.what is the sum of number​

Two Number are in ratio 2:3 ,if their l.c.m is 48.what is the sum of number