B. The variable d represents an unknown number. So, 21+d, is equal to 21+an unknown number.
Answer:
4 or-1- i dont know
Step-by-step explanation:
Answer:
She bought 7 coach tickets and 7 first class tickets.
Step-by-step explanation:
1. Set the equations up using y to represent first class and x to represent coach:
x + y = 14
370x + 1140y = 10,570
2. Use a graphing calculator to graph the equations and find the point where they intersect. The intersection point will tell you the number bought:
4/9 divided by 2/3 divided by 5/6 = 4/5
when you divided by two fractions, you can flip the denominator and numerator and then mutiply
25/4 because it equals 6 1/4 which is right inbetween