6/40 is equalvilant because all you have to do is double or simplify it by 2
Answer:
The correct answer is 18
the correct expression is 
Step-by-step explanation:
let the number be n
therefore if he is required to multiply n by 4 and added to 6 we have

given that he did otherwise by adding 6 to n and multiply by 4 we have

Firstly we need to solve for n in equation 2

Dividing both sides by 4 we have

In order to solve for the correct answer let us input n=3 in equation 1 we have

Answer:
I believe the answer is (9, -13.5)
Step-by-step explanation:
you do 6×1.5 and -9×1.5 to enlarge/dialate the quadrilateral
again I believe this is right so sorry if I am wrong
Answer:
120+100+120+120+x+x+10=720 (given)
470+2x=720
2x=720-470
x=250/2
x=125
Step-by-step explanation:
C because if you divide 3/12 you get .25 but 4/18 is .22, which is the better deal