12. ธงชัยซื้อสมุด 2 เล่ม เล่มละ 10.50 บาท และชื้อปลก๓ว 1 ด้าม ราคา 7.25 บาท เขาจะต้องจ่ายเงินกี่บาท

4. \( \left\{\begin{array}{l}x-3 y=-9 \\ 2 x+5 y=4\end{array}\right. \)

105. Halla el número que dividido entre -6 da 5 .

Calcola la misura del raggio di una circonferenza cui appartiene un arco lungo \( 18 \pi \mathrm{~cm} \) e il cui angolo al ce corrispondente è ampio \( 37^{\circ} 30^{\prime} \).

What statement describes the \( x \)-intercept of the graph? A. The \( x \)-intercept is 200 , which represents the initial distance B. The \( x \)-intercept is 5 , which represents which represents the initial distance C. The \( x \)-intercept is 200 , which represents the hours traveled to reach your destinat D. The \( x \)-intercept is 5 , which represents the hours traveled to reach your destinatio

What are the zeros of \( f(x)=x^{2}+x-12 \) ? A. \( x=-4 \) and \( x=3 \) B. \( x=-2 \) and \( x=6 \) C. \( x=-6 \) and \( x=2 \) D. \( x=-3 \) and \( x=4 \)