Let 's x the width of the sidewalk.
Area of the swimming pool= 10*16=160 (ft²)
Area of the sideway+the swimming pool= (16+2x)*(10+2x) =160+155
==>160+20x+32x+4x²=160+155
==>4x²+52x-155=0
Δ=52²+4*4*155=5184=72²
==>x=(-52+72)/2=5/2 or x=a negative to exclude.
Width of the sideway=5/2 ft
so tell me if i helped
1-first rectangle has 2ft as the length and 2ft as the width. The second rectangle has 2ft as the width and 3ft as the length.
2-THe length is add 1 starting from 2.
You have to find the least command denominator of 7 and 5 which is 35.Then it will be 6 15/35 and 2 7/35. Then Your answer will be 4 8/35
Answer:
question 8: AB = 25 units
wuestion 9: CD = √89 o.r. ≈ 9.4339
explanations in image :)
4/12=.33 with a little line on top of the 3 on the second two