Answer:
18
Step-by-step explanation:
A two-digit number (xy) will have the value 10x+y. The sum of its digits is x+y.
You want ...
10x +y = 2(x +y)
1 ≤ x ≤ 9
0 ≤ y ≤ 9
The equation can be simplified to ...
8x = y
The only single-digit values for x and y that satisfy the requirements are ...
x = 1, y = 8
The two-digit number of interest is 18.
_____
<em>Check</em>
Its sum of digits is 1+8 = 9. 2×9 = 18.
_____
<em>Comment on the relationship in the problem</em>
Many of us learned our multiplication tables for 9s by remembering that the sum of digits of 9n was 9, and that the leading digit of the product was n-1.
Answer:
Step-by-step explanation:
<u>The factored form, use variables/numbers outside the square:</u>
<u>The standard form, use variables/numbers inside the square:</u>
- x² + 6x - 4x - 24 = x² + 2x - 24
Answer:
x = 4
Step-by-step explanation:
By BPT
Answer:
1/5
Step-by-step explanation:
Note that this graph goes through (0, 0) and (2/5, 1/2).
Thus, the slope of the graph is m = rise / run = (1/2)/(2/5) = 1/5.
This m = 1/5 is ALSO the constant of proportionality.
Answer:
idek lol
Step-by-step explanation:
heheheheehhehehehehehehehehheheheehhe
