A farm had 480 acres more wheat than corn. Let use "W" to represent the Wheat and let use "C" to represent the corn. Hence, we have below: W=C+480
The farmers collected 80% of the wheat and 25% of the corn and the area of the wheat is 300 acres less than the area of the corn: W-0.8W=C-0.25C+300 0.2W=0.75C+300 We have two equations, two unknowns: 0.2(C+480)=0.75C+300 0.2C+96=0.75C+300 0.55C=294 C=534.55
A farm had 480 acres more wheat than corn.W represent wheat.C represents corn.So the equation for this part is:W=C+480.
After the farmers collected 80% of the wheat and 25% of the corn, the area of the wheat was 300 acres less than the area of the corn. So the equation is:W-w-0.8W+300=C-0.25C.which simplfies to:
0.2W+300=0.75C
we have 2 eqations with unknown variables.
W=C+480
0.2W+300=0.75C
we will use the substitution method by plugging in the first equation into the second equation.
The prime numbers that lie between 1 and 21 are 2,3,5,7,11,13,17, and 19. These 8 balls, plus the 10-ball comes to a total of 9 balls that could be picked out of the 21. Therefore, the probability of picking one of these balls is 9/21 or 3/7
