A gravel company sells rock at a rate of \( \$ 300 \) for 250 cubic feet. A. What is the price for each B. How much would it cost to purchase 500 cubic feet of gravel?

23. Mr. Sharma his total in the remaini expenses ar 1,700 mont monthly ince

Simplify \( x+9 x \) \( x+7 x^{\frac{1}{2}} \)

(ii) Use your answer to part (a)(i) to solve the equation \( x^{2}+8 x-9=0 \).

Calcular \( \vec{a} \times \vec{b}|;|\vec{a} \times(\vec{b}-\vec{c})| ;| \overrightarrow{C a}+c) ;(b+a) \mid \) 1) \( a=\overrightarrow{5} i+\overrightarrow{3} j-2 \vec{k} ; \vec{b}=\langle 8,-2,5\rangle \vec{c}=\langle 6,4,2\rangle \)

(b) The solutions of the equation \( x^{2}+b x+c=0 \) are \( \frac{-7+\sqrt{61}}{2} \) and \( \frac{-7-\sqrt{61}}{2} \) Find the value of \( b \) and the value of \( c \).