Answer:
.08, .25, .42, .82
Step-by-step explanation:
1/4, 0.08, 3/7, 82%
.25, 0.08, .42, .82
18. x=31
19.x=15
20. a. x=5 WXY= 28
b. YXZ=28
c. WXZ=56
-10+sqrt2x+1 = -5
sqrt2x+1 = -5+10
sqrt2x+1 = 5
2x+1 = sqrt5
2x = sqrt5-1
x = (sqrt5-1)/2
x² - y² = 135
<=> (x - y)(x + y) = 135
<=> 15(x + y) = 135
=> x + y = 135/15 = 9
=> (x + y)² = 81
