Answer:
i think its f
Step-by-step explanation:
(2,-5) https://www.mathpapa.com/algcalc2/?utm_expid=69051716-16.tNCYGchyRSmAD_peBBMf2Q.1&utm_referrer=https...
Answer:x=7
Step-by-step explanation:
180=112+9x+5
Collect like terms
180-112-5=9x
63=9x
Divide both sides by 9
63/9=9x/9
7=x
x=7
Answer:
The sum of the age of pupils is 81
Step-by-step explanation:
Let sum of age of 18pupils = x
Average ages = 4.5
Average = total/no. of pupil
4.5 = x/18
x = 81