I'm struggling with some questions on expanding surds in brackets and was wondering if anyone could me out. here are the questions: (√2+4)(√2+7) (√5+2)(√5-9) (9+√7)(9-√7)

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).

Jason went to an arcade to play video games. he paid $2 for every 11 tokens he bought. he spent a total of $16 on tokens. which equation can be used to determine,t, the number lf tokens jason bought

What is perpendicular to y=-1/2x+11