Answer:
The answers are 10y - 10r and 18
Step-by-step explanation:
10(y - r)
10y - 10r
___________________
2(3 + 6)
6 + 12
18
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Answer:
9
Step-by-step explanation:
22x = 198
divide both sides by 22
22x/22 = 198/22
x = 9
It should be 986m
4(17x6)= 408
2(17x17)= 578
408+578=986
Answer:
- Mean score=120
Step-by-step explanation:
- Areas of a triangle add upto 180degrees (63+78+x=180) 141+x= (x=180-141) x=39
- Areas on a straight line add upto 180degrees
180-78=102
180-63=117
180-39=141
- 102+117+141=360
- Mean=360/3 =120