4 hundreds 13 tens 5 ones = 4*100+13*10+5*1=400+130+5= \boxed {535}
Answer:
Already in standard form
Step-by-step explanation:
A quadratic equations standard form is ax^2 + bx + c. This equation is already in standard form.
ax^2 + bx + c
1/2 x^2 - 4x + 3
The percentage change is 20%
Answer:

Step-by-step explanation:
Keiko sent 30 text messages Scott sent 20 text messages chang sent 80