Answer:
5040 different combinations
Step-by-step explanation:
0-9 = 10 numbers
1st digit can be 1 0f 10
2nd digit can be 1 of 9
3rd digit can be 1 of 8
4th digit can be 1 of 7
10×9×8×7=5040
70 times .9 is 63 so 90 minus 63 is27 so it was $27
Question 9 answer is 0.375
Question 10 answer is 0.03125
Answer: Ian's height = x+14 = 69+14 = 83 cm
Explanation :
Let the height of Jim be x
Let the height of Ian be x+4
Let the height of Lisa be x+4+10=x+14
Since their heights increase by 2cm every months
so after 7 months ,
Jim's height = x+14
Ian's height= x+4+14=x+18
Lisa's height= x+14+14=x+28
According to question,
Sum of Ian's and Jim's height = 170cm

⇒x = 
⇒ x= 69cm
∴ Ian's height = x+14 = 69+14 = 83 cm
Answer:
3
Step-by-step explanation:
I can see it in the demonstration graph