Answer:
=−15a2c7−12a3c4+24a2c4
Step-by-step explanation:
A. Joint frequency, it’s right I checked it myself
Answer:
I think you meant
It would false
Step-by-step explanation:
X+Y=78___1
X-Y=10____2
1+2
X+Y=78
X-Y=10
+_____
2X=88
X=44
Sub X=44 in 1
44+Y=78
Y=34
Therefore the numbers are 34,44