Answer:
81cm
Step-by-step explanation:
15cm + 20cm + 21cm + 25cm = 81cm
1.Simplified each one
2/5 (both divided by 7) , 1/2 (divided by 21)
2.Make them into integer
(2/5 )*(2/2)=4/10 , (1/2)*(5/5)=5/10
Now the dominators are the same ,you can just compare the numerators. It is 4:5
An expression is a mathematical phrase containing at least one variable :)
Answer:
14 - 13x
Step-by-step explanation:
take 13x + 1 away from 15
15 - (13x + 1) = 15 - 13x - 1 = 14 - 13x
Answer:
-12, 0
Step-by-step explanation: