(3x-5)(2x+7) =
= 3x·2x + 3x·7 - 5·2x - 5·7
= 6x² + 21x - 10x - 35
= 6x² + 11x - 35
Since the first term is x², you know that each group will begin with x. To find the second part of the groups, you need to find two numbers that add up to 10 and multiply to 25. You can do this by listing all the factors of 25 until you find a set that adds to 10.
25 x 1
5 x 5
-5 x -5
The second terms in your groups will be -5 and -5.
(x - 5) (x - 5) This can be simplified to (x - 5)².
Assuming you meant...
'Johan is selling baseball cards for 12$ each. He is selling 8 cards and says he'll make 8$ profit. How is it reasonable if the answer is correct?'
The answer is reasonable if he is only making a $1 profit per baseball card. For example if he bought the baseball cards for $11 and is selling them for $12, than he only makes $1 for every cards sold. If he sells 8cards, he'll make an $8 profit.
The answer is 1600,you get 2/3 multiply it by 2400 to get 1600
D. FH
Diameter-
a straight line passing from side to side through the center of a body or figure, especially a circle or sphere.
