Answer:
Step-by-step explanation:
Hi,
let's note the two integers a and b
We are asked to find b
<em>replace a in the first equation</em>
As b must be a positive integer, the solution is 11
Hope this helps
Answer:
60°
Step-by-step explanation:
the angle Θ between vectors a and b is
cosΘ = = = = , then
Θ = ( ) = 60°
The formula you need to use is a^2 + b^2 = c^2. A is the side of 3 and B is the side of 7, so 3^2 + 7^2 = c^2.
9 + 49 = c^2
58 = c^2
√58 = C
So your answer is C. √58. I hope this helps!