Answer:
Step-by-step explanation:
hello :
the system is : x+ y =4 ...(*)
2x - y = -1...(**)
add(*) and (**) : 3x=3 so : x=1
put this value into (*) : 1+y=4 so : y=3
one solution : (1 , 3)
Answer:

Step-by-step explanation:
3a²*2a³ = (2*3)(a² *a³)= 
Answer:
-bx+5b-2x+10
Step-by-step explanation:
https://www.mathpapa.com/algebra-calculator.html?q=%5Cleft((5-x)(b%2B2%5Cright)
Answer: Trapezoid
Step-by-step explanation:
Trapezoids are parollelograms, that’s all
Answer:
0.75
Step-by-step explanation: