Answer:
20
Step-by-step explanation:
5x4= 20
She has 7 soccer trophies.
So lets assume she wants to display it in a straight line:
The 1st has 7 ways
The 2nd has 6 ways
The 3rd has 5 ways
The 4th has 4 ways
until the last.
Total = 7 × 6 ×5 × 4 × 3 × 2 × 1 = 5040 ways.
#1
Lets x = number of adult tickets
Lets y = number of children tickets
equation 1: 8x + 4y = 5040
equation 2: x + y = 680
solve them by using substitution
x + y = 680
x = 680 - y
substitute x = 680 - y into 8x + 4y = 5040
8(680 - y) + 4y = 5040
5440 - 8y + 4y = 5040
-4y = 5040 - 5440
-4y = -400
y = 100
x = 680 - y
x = 680 - 100
x = 580
Answer:
There were 580 adults and 100 children at the last Miller's home basketball game.
#2
Similar to the #1
Lets x is the number of people riding school bus
Lets y is the number of people riding luxury charter bus
equation 1: x + y = 65
equation 2: 8x + 15y = 611
Answer:
16. 7
17. 12
18. 4
19. 32
20. 10
Step-by-step explanation:
