Answer:
1. 2x^2+3x^2-8 (you can only combine when the variable and exponent are the same).
2. 5x^2-4-4
3. 5x^2(-16)-8
The answer 5 (1/4) because if you add 1 and a quarter to it then that would make it 6 and a half
Answer:
x=20
Step-by-step explanation:
30°-60°-90°Δ
a=10
b=20
c=10
x=b
x=20
Volume of prism = area of base * height
= area of triangle * height
(in this case triangle)
Volume = ( 0.5*13*13)*7
= (84.5)*7
= 591.5
answer is C