461 because you take 506-45 to find x(the unknown number)
"She needs 1.5 cups of flour for 1 batch, but she wants to make 2.5 batches."
This means that she needs 7.5 cups of flour for 5 batches.
Hence, she needs 3.75 cups of flour for 2.5 batches.
(2x+1)(x+1)
Now multiply 2x to both x and +1
2x^2+2x
Do the same with 1 multiply it to x and +1
2x^2+2x +x+1
Simplify
2x^2+3x+1
I think this is right.. I tried my best. If u get it sorry... I’m very sorry
1. Divide 7.20 by 4 since the 4 are the pencils
2.divide 7.20 by 5 ( 5 represents the erasers )
3. Then finally multiply 1.44 from 7.20/5 and
2 and u get 2.88