1. 4x=64
x=26
2. 9x=20
x=9/20
3. 8+5x<70
5x<62
x<12.4
4. 2+x=50
x=52
5. n+5-5<15
n<15
6. x-10=30
x=40
7. x+5=13
x=8
8. a+8=20
a=12
9. x·3=27
x=9
10. x²=2+6
x²=8
x=√8
x=-√8
Hello there, and thank you for posting your question here on brainly.
The HL Theorem is when two triangles don't look the same but have the same side lengths.
I'm pretty sure triangles a and c are congruent.
Hope this helped!! ☺♥
A. Solution set is in the attachment (dark green shading in the middle)
B. Yes, 2(5) + 3(1) ≤ 15; 13 is less than or equal to 15
5 + 1 > 3, 6 is greater than 3
C. (4, 2) means that he buys 4 sandwiches and 2 hot lunches