It costs $3.15 to buy 3/4 lb of chopped walnuts. How much would it cost to purchase 7.5 lbs of walnuts?

Each month, a shopkeeper spends 5x + 14 dollars on rent and electricity. if he spends 3x−5 dollars on rent, how much does he spend on electricity? for which value(s) of x is the amount the shopkeeper spends on electricity less than $100? explain how you found the value(s).

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

The functions below show the amount of money bella and sweet t had saved after earning money for doing chores. which description best compares the two functions?