C. 24.5 is the only answer that adds up to 49.
Sub for each other since both equals y
2x-3=y=2x+5
2x-3=2x+5
minus 2x oth sides
-3=5
false
no solution
(we can see that since slopes are same and y intercepts are differnt, the lines are paralell and therfor never intersect)
D. No solution
Basically, x never reats with a different y
(x,y)
A is a fn of x since x never repeats
B is a fn of x since x never repeats
C is a fn of x since x never repeats
D is not since we have (1,2) and (1,-2) so this is the answer
answer is D
Step-by-step explanation:
26×12 = 312
partial products are "strange". but ok, since your teacher wants it that way :
multiply the tens with the tens : 20×10 = 200
multiply the tens with the ones : 20×2 = 40
multiply the ones with the tens : 6×10 = 60
multiply the ones with the ones : 6×2 = 12
--------
312
so, 12 and 40 are correct from the original list, 600 and 2000 are wrong.
how do you do it conceptually ?
26×12 start with the left digit (1),
multiply the left number right to left
6×1 (no carry) 6
2×1 2
26
next digit to the right (2),
also move the result one position
6×2 (carry 1) 2
2×2 (plus carry) 5
52
now we add position related
26
52
---------
2
1 (and carry 1)
3 (2 plus carry)
312
x=-3 y=0 probably wrong but it’s the root of at least one of these
