<h2>Explanation:</h2><h2 />
Here we have to compute the dot product:

We know that:

So for any two vectors:

The dot product:

Therefore:

120
Step by step explanation:
Divide 1200 by 10
That equals 120
You can back check by multiplying 120 by 10
Answer:
92°F
Step-by-step explanation:
in degrees Fahrenheit,
t=7
f(7)=64 + 4(7)
=92
7c+ 12= -4c+ 78
⇒ 7c+ 4c= 78 -12 (inverse operation)
⇒ 11c= 66
⇒ c= 66/11 (inverse operation)
⇒ c= 6
Final answer: c= 6.