Answer:
0
Step-by-step explanation:
x2 +4x-21=0. solve for x


Answer:
Step 1 should be (14.4+18)...PEMDAS
Step-by-step explanation:
Answer:
2:5
Step-by-step explanation:
Because if we look 8:20 can be turned into 8/20 and if we simply we got 2/5 and turn it into 2:5