Answer:
54
Step-by-step explanation: you add 35 and 11 together then subtract 100 by the number you got to get the anwser
Hello,
x= the number
3x= three times the number
seven decreased by three times a number is forty, then:
7-3x=40
-3x=33
x=-11
Answer: the number is -11
The answer is 586.17 cm^2