I am sorry but what level is this
The answers are:
the first term: 21
the fourth term: 22
the tenth term: 39
<span>A(n) = 12+(n - 1)(3)
n = 1
A(1) = 12 + (1 - 1)(3) = 12 + 0*3 = 12 + 0 = 12
n = 4
</span>A(4) = 12 + (4 - 1)(3) = 12 + 3*3 = 12 + 9 = 21
n = 10
A(10) = 12 + (10 - 1)(3) = 12 + 9*3 = 12 + 27 = 39
First, look at the ratio. And out of 2&3&4, 2 is the smallest. So, change the 2 to 15, 3 to X, 4 to Y. Like this down below
15:X:Y
Now, if 2=15, 1=15÷2, which is 7.5
If one is 7.5, the X=3×7.5=22.5
Y=4×7.5=23
Add them all up, 15+22.5+23=60.5
The perimeter is 60.5
Answer: 2.5
Step-by-step explanation:
first, transform the expression.
3√4^2
then, evaluate.
3√16
finally, simplify.
(alternate form): 2.51984
simplified to 2.5
You may use the law of sines, that states that in every triangle the ratio between a side and the sine of the opposite angle is constant.
So, in your case, we have
![\dfrac{QR}{\sin(\hat{S})}=\dfrac{RS}{\sin(\hat{Q})}](https://tex.z-dn.net/?f=%5Cdfrac%7BQR%7D%7B%5Csin%28%5Chat%7BS%7D%29%7D%3D%5Cdfrac%7BRS%7D%7B%5Csin%28%5Chat%7BQ%7D%29%7D)
We know that
is 90 degrees, so its sine is 1. Also, we know that RS=26. So, the equation becomes
![QR=\dfrac{26}{\sin(54)}](https://tex.z-dn.net/?f=QR%3D%5Cdfrac%7B26%7D%7B%5Csin%2854%29%7D)