Question
Ned divided a given number by 3 and then added 2. If he should have multiplied the number by 3 and then subtracted 2, which of the following two steps can he do next to get the correct answer?
Subtract 4 and then multiply by 9.
Subtract 12 and then multiply by 3.
Multiply by 3 and then subtract 4.
Multiply by 6 and then subtract 14.
Multiply by 9 and then subtract 20.
I think C.
Subtract 4 and then multiply by 9.
Subtract 12 and then multiply by 3.
Multiply by 3 and then subtract 4.
Multiply by 6 and then subtract 14.
Multiply by 9 and then subtract 20.
I think C.
Answers
Steve
he has n/3 + 2
he wants 3n - 2
to get the 3n, he needs to multiply by 9. That will give him 3n+18
So, then he needs to subtract 20.
he wants 3n - 2
to get the 3n, he needs to multiply by 9. That will give him 3n+18
So, then he needs to subtract 20.
Anonymous
Subtract 3(-x2 +6xy-4) -2y2+9 from 12-2y(y-9x)+x²