George sells baseball cards online. He estimates he can make $4.75 per card. If George has 83 cards, using front-end estimation, which choice would be closest to the amount George would make if he sells all his cards? A. $320
B. $400
C. $470
D. $500

Sarah used her calculator to find sin 125 degrees. she wrote down sin sin125 degrees.57. how could sarah recognize that her answer is incorrect?

Jordan has $5.37, which he is using to buy ingredients to make salsa. he is buying one red pepper for $1.29 and three pounds of tomatoes. if jordan has exactly the right amount of money he needs, what is the price per pound of the tomatoes? choose the correct equation to represent this real-world problem. solve the equation and verify the reasonableness of your answer. a pound of tomatoes costs .

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.