6. Егер 4 n сусын d тr болса, \( 3 \mathrm{~m}-1 \) сусын неше тг тұрады? (A) \( \frac{4 n}{(3 m-1) d} \) (B) \( \frac{4 n d}{3 m-1} \) (C) \( \frac{4 n(3 m-1)}{d} \) (D) \( \frac{(3 m-1) d}{4 n} \)

4. \( 4 x-2 x+2=2 x-2-2 x \)

Greg drove at a constant speed in a rainstorm for 280 miles. He took a break, and the rain stopped He then drove 264 miles at a speed that was 9 miles per hour faster than his previous speed. If he drove for 14 hours, find the car's speed for each part of the trip. The rate of the car in the rain was

a) \( 2 / 6=9 / x \) b) \( 1 / 3=x / 12 \) c) \( x / 10=6 / 5 \) d) \( \delta / x=2 / 15 \)

Solve for the variable specified. \( A=\pi\left(k^{2}+R^{2}\right) p ; \) for \( k \)

Solve for \( M \). Assume that all other variables are nonzero. \( Q=\frac{2 \text { twM }^{2}}{3 c} \) \( M=\square \) (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.