Sue's Sushi placed two orders with its fish supplier. One order was for 11 pounds of salmon and 6 pounds of tuna; the order totaled $197. The other order was for 8 pounds of salmon and 4 pounds of tuna; this order totaled $140. What is the cost for one pound of salmon and one pound of tuna? A. $13 salmon; $9 tuna B. $10 salmon; $12 tuna C. $9 salmon; $13 tuna D. $15 salmon; $7 tuna
Will give 60 pts and brainliest

Yes, two vertical lines can be complementary

Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle

Many things that seem threatening in the dark become welcoming when we shine light on them