Here, I'll do the first one for you.
When they are talking about a number, use "x".
Since it says twice a number, you say 2x. Or 3x for three times the number
2x+12=3x-31
Then use algebra to find x. Get the numbers on one side and all the x's on the other.
2x+12+31=3x-31+31
2x+43-2x=3x-2x
x=43
Now do the rest on your own!
Answer:
27
Step-by-step explanation:
22
24
25
26
27 - middle AKA median.
28
28
29
36
Answer:
1/9
Step-by-step explanation:
3^-2 = 1/3^2
1/3^2 = 1/9
Answer:
The numbers are 2 , 4 , 6 or 6 , 4 , 2
Step-by-step explanation:
For solution kindly refer to the attachment .
<u>Related</u><u> </u><u>Information</u><u> </u><u>:</u><u>-</u><u> </u>
• The sum of n terms of an AP is ,
=> S = n/2 [ 2a + ( n - 1 ) d ]
• The nth term of an AP is ,
=> T_n = a + ( n - 1 ) d