Answer:

Step-by-step explanation:
we have

Remember that


in this problem we have

Convert
to minutes

so

Convert
to seconds

therefore

Answer:
C. Obtuse
Step-by-step explanation:
First solve for x in the first equation. So you'll have to substitute,
5(3x-7)=20
15x-35=20
Then add 35 to both sides.
15x=55
Divide 55 by 15.
So x = 3.66...
Then plug in 3.7 for x in 6x-8
6(3.7)-8
Its approximately 14.2
X=5, y=-4
(5,-4)
do you need the work?