Find and solve a system of linear equations to answer the question below. Joanne buys one kilogram of French Roast and one kilogram of Boxer Blend
from the Java Hut. Jacob buys two kilograms of French Roast and three
kilograms of Boxer Blend. If Joanne spends $23 for her purchase, and Jacob
spends $58 for his, what is the price of one kilogram of Boxer Blend coffee?
$
Answer here

This is geometry. could anyone ? i can't fail this class. my grade is quite low already.

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

Aroulette wheel has 38 slots in which the ball can land. two of the slots are green, 18 are red, and 18 are black. the ball is equally likely to land in any slot. the roulette wheel is going to be spun twice, and the outcomes of the two spins are independent.the probability that it lands one time on red and another time on black in any order is(a) 0.5 (b) 0.25 (c) 0.4488 (d) 0.2244