3x - 2y = 10
10x + 2y = 8 (everything *2)
minus
Therefore final equation is -7x = 2 B

Answer:
1.01 × 10⁴ - scientific notation
10,100 - decimal notation
Answer:
320 or 40 sorry if I´m wrong
Step-by-step explanation:
I have a link but it’s not fake
To get the coordinates of C we shall proceed as follows:
AB:BC=1:4
B-A=[(-3--7),(-5--8)]=(4,3)
4(4,3)=(16,12)
thus the coordinates of C will be:
(16-3,-5+12)
=(13,7)