What is the solution set for this inequality? \( 10 x-6 \geq 4 x+12 \) b.) \( x \leq 3 \) c.) \( x \leq 1 \) d.) \( x \geq 1 \)

7. (Q6; 2,6 ball) \( \frac{a+b}{2} \geq \sqrt{a b} \) dan foydalanib, \( 16 x+\frac{9}{25 x} \) ifodaning eng kichik qiymatini toping. \( (x>0) \)

177. Mukul has \( \$ 3.75 \) in quarters, dimes and nickels in his pocket. He has five more dimes than quarters and nine more nickels than quarters. How many of each coin are in his pocket?

\( \left\{\begin{array}{l}\text { (Q1; 2,6 балла) Решите систел } \\ x+y=3 \\ x^{2}-y^{2}=21\end{array}\right. \)

If \( 3 x+5 x+y=3 x+5 x+2 y \) then \( y=? \)

b) \( x(x+6)+x+6=0 \)