Answer:
b = 11 m
l = 44 m
Step-by-step explanation:
l = 4b (length is four times width)
Perimeter = 110 m
2 * ( l + b ) = 110
2 * (4b + b ) = 110
2 * 5b = 110
b = 110 / ( 2*5) = 11
b = 11 m
l = 4b = 4 * 11 = 44 m
Step-by-step explanation:
Increase the number by 5% of its value.
Percentage increase = 5% × 220
New value =
220 + Percentage increase =
220 + (5% × 220) =
220 + 5% × 220 =
(1 + 5%) × 220 =
(100% + 5%) × 220 =
105% × 220 =
105 ÷ 100 × 220 =
105 × 220 ÷ 100 =
23,100 ÷ 100 =
231
Let g = original # of girls at the assembly.
Let w = # of boys at the assembly.
Equation of ratios:
w 3 boys
------- = ---- = --------------------------------------------
g-12 4 girls after 12 have left assembly
4w + 36
Cross-mult., 4w = 3g - 36, so 4w + 36 = 3g, and g = --------------- (answer)
4
This is "original # of girls at the assembly in terms of w, the # of boys at the assembly."
5+sqrt(4)=5+2=7
very simple
