Kmart has a 20% sale on all items. How much will you pay for a 40 inch flat-screen television with an original piece of $899?
0.8 * 899 = $_______
Can I please ask you got 0.8 Ms. Sue?
100% - 20% = 80% = 0.8
We could have multiplied 0.2 * 899 = 179.8 and then subtracted that from 899.
Oh okay thank you
You're welcome.
Ms. Sue I have another problem. "I am thinking of a number. When I double it and add 9, I get 25. What is the number?"
Isn't the answer 4? 4*4=16+9=25. Am I correct?
No.
When you double a number you multiply it by 2. You do not square it.
2x + 9 = 25
Oh so the answer is 2? Correct?
No.
Can you solve this equation?
2x + 9 = 25