The sum is the total of two numbers. For example, the sum of 2 and 3 is 5
Answer: 9x^2 + 2x - 5
Step-by-step explanation:
6x^2 - 5x + 3 + 3x^2 + 7x -8
Like terms are: (6x^2 and 3x^2), (-5x and 7x), and (3 and -8)
6x^2 + 3x^2 = 9x^2
-5x + 7x = 2x
3 + -8 = -5
9x^2 + 2x - 5 is the simplest answer
Answer:
60
Step-by-step explanation:
Given the following :
Half of baseball card got wet and was ruined
Number of baseball cards bought has replacement for the ruined cards = 20
Total number of baseball cards now = 50
The initial number of baseball cards =?
Let the initial number = y
Number that hit ruined = half of initial = y/2
Hence,
y - y/2 + 20 = 50
y/2 + 20 = 50
y/2 = 50 - 20
y/ 2 = 30
y = 30 * 2
y = 60
Hence, he started with 60 baseball cards.