Answer:
-6
Step-by-step explanation:
add -3n and -4n= -7n
add 17 to 25
-7n=42
n=-6
Answer:
otal concrete weight =2400kg
have 15% water means in 2400kg of concrete 360kg is water.ramaining 2040kg is of cement,sand and stone.in the ratio of 1:2:5 respectively.then according to ratio.weight of cement=255kg
weight of sand=510kg
weight of stone=1275kg
Step-by-step explanation:
#31
= - 8/-8
= 1
#32
= 28/7
= 4
#34 True
#35 True
#36 False
#37 False
#38 True
Answer:
$140
Step-by-step explanation:
each pair of shoes costs $20 (80 dvided by 4). 20 times 7 is 140
The answer should be n= -6