<span>By by pythagorean theorem
12 (squared) + r (</span>squared) = (8+r) squared<span>
so 144 + r ( </span>squared) = 64 + r (squared)<span> +16r
so solving for r:
144 -64 = r </span>squared –r squared<span> + 16r
80 = 16r
so r = 80/16= 5
the second is the same
21 </span>squared + r squared = (9 + r ) squared<span>
441 + r </span>squared = 81 + r squared<span> + 18r
441 – 81 = r </span>squared – r <span>squared</span><span> + 18r
r = 360/18 = 20</span>
I'm so sorry if these are wrong...
1. y=-7/5x-3
2. y=1x+6
3. y=5/4x-8
4. y=1/4x-2
5.y=-5x-2
6. y=-2/5x-3
7. y=5x+19
8. y=2x-6
9. y=-4/5x-5
10. y=-4/5x+4
Answer:
2000
Step-by-step explanation:
Answer: B
Step-by-step explanation:
I got it right on Edge
