Show the steps you use to solve the problem. estimate: 120divied by 3

40

Step-by-step explanation:

1. We can tell 120 is divisable by three.  A trick I like to use is adding all the individual numbers with that numbers and seeing if the sum is divisible by three.

EX: 1+2+0=3 so we know 120 is divisible by three

7+2=9 so we know 72 is divisable by three.

2. divide the number by ten in your head.  

120/10=12

3. 12/3=4

4. 4x10=40

5.120/3=40

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a