It would be A. You can find this out by using SOH CAH TOA,
SOH means sin= opposite/hypotenuse
CAH mean cos= adjacent/hypotenuse
TOA means tangent= opposite/adjacent
You would use CAH since you are trying to find cos∠C
You would have cos∠C=10/26.
26 is the hypotenuse since it is opposite the right angle and is the biggest side.
10 is the adjacent since it is right next to C
You would simplify this down to 5/13 by dividing by 2.
This gives you A.
Answer:
I believe the answer is C. 90 degrees
Step-by-step explanation:
First you find the lengths of the two vectors, which are both 
. Then you find the angle given the cos using: cos(∅)=
= 
= 0. Then using ∅=acos(0)=
= 90°
<h2>
Answer:</h2>
8x+9
<h2>
Step-by-step explanation:</h2>
12x+1 = 2(2x+5)
<h3><em><u>Handle the brackets first</u></em></h3>
12x+1 = 4x+10
<h3><em>
<u>Collect like terms</u></em></h3>
=8x+9
Answer:
28$ and christen sold 7 boxes while Rafael sold 4
Step-by-step explanation:
lower common multiple so take 4 x 7 = 28 as then take the 28 and divide by how much Christen gets a box which is 4 and 28 divided by 4 is 7
