Answer:
4/9
Step-by-step explanation:
Answer:
100% true....
subtracting 19 from both sides brings you to 2x=8, so x=4
Step-by-step explanation:
Answer:
12.5 % decrease
Step-by-step explanation:
To find the percent loss
Take the original amount and subtract the new amount
2.4 -2.1 = .3
Divide by the original amount
.3/2.4 = .125
Multiply by 100 to change to a percent
12.5 %
This is the percent decrease
<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>
