Answer:
5
Step-by-step explanation:
let the number written on the board be x.
1st student's number= x +23
2nd student's number= x -1
<em>1</em><em>st</em><em> </em><em>student</em><em>'</em><em>s</em><em> </em><em>number</em><em>=</em><em> </em><em>7</em><em>(</em><em>t</em><em>h</em><em>a</em><em>t</em><em> </em><em>o</em><em>f</em><em> </em><em>the</em><em> </em><em>2nd</em><em> </em><em>student</em><em>)</em><em>,</em>
x +23= 7(x -1)
x +23= 7x -7 <em>(</em><em>expand</em><em>)</em>
7x -x= 23 +7 <em>(</em><em>bring</em><em> </em><em>constant</em><em> </em><em>to</em><em> </em><em>1</em><em> </em><em>side</em><em>)</em>
6x= 30 <em>(</em><em>simplify</em><em>)</em>
x= 30 ÷6 (÷6 on both sides)
x= 5
Thus, the number written on the board is 5.
I know the parabola will open downward because the leading coefficient of the equation, being -5, is negative/less than zero.
Answer:
m=3
Step-by-step explanation:
Answer:
ok im not sure this is the right answer to your specific question, because i dont understand the wording to well, but here...
for 1/7 and 1/2 it would be 2/7 and 1 (whole)
for 1 and 1/7 it would be 2(whole) and 2/7
for 1 and 2/7 it would be 2(whole) and 4/7
for 4/9 it would be 8/9 and x
and for 2/9 it would be 4/9 and x
sorry if thats not the question :)
EDIT: its the second one because
2*1/7= 2/7
and 1/2*2=1
