Answer:
Step-by-step explanation:
<u>The numbers from 1 to 9999 can be shown in the form of:</u>
Each of x, y, z represent the digits from 0 to 9, so 10 ways each.
<u>For each of the forms we have:</u>
<u>Total of:</u>
By the way this is applicable to any digit.
8x + 7y = 39
4x - 14y = -68
(multiply each term in second equation by -2)
8x + 7y = 39
-8x + 28y = 136
(add both equations)
35y = 175
(divide both sides by 35)
y = 5
(substitute value of y in one of the equations)
8x + 7(5) = 39
8x + 35 = 39
8x = 4
x = 1/2
(x, y) = (1/2, 5)
Answer:
yes i think
Step-by-step explanation:
Answer:

Step-by-step explanation:
We have been given two expressions
and

Now we need to find out least common multiple of these two expressions.
First we need to find out what is common factor of both expressions.
and

Least common multiple means find the expression which can be divided by both expressions.
15 and 6 both goes into 30
so 30 is part of LCM (least common multiple )
Now pickup the highest exponent of each variable.
So we get 
Hence required least common multiple is 
Answer:
one mile per hour
Step-by-step explanation: