2 answers:
Ratio of boys to girls in class
3 : 5 40
Boys + giris 3 + 5 = 8 Total 40
Unit of ratio - 40/8 = 5
Boys = 5 * 3 = 15 Girls = 5 * 5 = 25 Total 40
Add 3 new girls Girls 25 + 3 = 28
Minus 1 boy Boys 15 - 1 = 14
New ratio boys to girls is 14 : 28
Simplify 14/28 = 1/2
New simplified ratio of boys to girls is 1 : 2
Boys : Girls = 3 : 5
3 + 5 = 8 parts
<u>Find 1 part:</u>
8 parts = 40 students
1 part = 40 ÷ 8 = 5 students
<u>Find number of boys and girls:</u>
3 parts = 3 x 5 = 15 girls
5 parts = 5 x 5 = 25 boys
Original Number of students = 15 : 25
<u>Find new ratio:</u>
New Ratio = 15 + 3 : 25 - 1 = 18 : 24 = 3 : 4
Answer: 3 : 4
You might be interested in
Answer:
(3x^2-5x-5)/(x^2+x) <--- answer
Step-by-step explanation:
3x/(x+1) - 5/x = (3x^2 - 5(x+1) )/[ x(x+1) ]
= (3x^2 - 5x - 5)/(x^2 + x)
Answer:
55
Step-by-step explanation:
Because of the parallel lines (marked by those arrows) we know that the corner angles are the same:
110 - x = x so
110 = 2x
55 = x
The answer is B) 0,43$, because 3*0,43 = 1,29
Dividing by 100 shifts each digits two paces because 100 has two zeros.
Each 0= a digit shifts to the right
hope this helps c:
Answer:
3× + 16 = 22.75
3× = 22.75 - 16
<u>3x</u><u> </u>= <u>6</u><u>.</u><u>75</u>
<u> </u><u> </u><u> </u><u> </u><u> </u><u> </u><u> </u>3 3
x = 2.25
