Answer:
2/4
Step-by-step explanation:
Using a graph, you would start at (-1,2). Next you would move up twice. Then you would move 4 lines to the right. You'll land on (3,4)
Answer:
B.
Step-by-step explanation:
2x+4-1
Answer:
Step-by-step explanation:
- 1) Total points = 25
- 2) Points earned = 21
- 3) Percent score = 84%
<u>Proportion:</u>
Solving the others in the table
<u>21 out of 25 points:</u>
- 21/25 = x/ 100 ⇒ x = 100*21/25 = 84
<u>15 out of 20 points:</u>
- 15/20 = x/100 ⇒ x = 100*15/20 = 75
<u>47 out of 50 points:</u>
- 47/50 = x/100 ⇒ x = 100*47/50 = 94
<u>28 out of 30 points:</u>
- 20 / 30 = x/100 ⇒ x = 100*20/30 = 66.66
<u>19 out of 45 points:</u>
- 19/45 = x/100 ⇒ x = 100*19/45 = 42.22
<u>3 out of 4 points:</u>
- 3/4 = x/100 ⇒ x = 100*3/4 = 75
Let the initial number of girls be x, this represents 40% of the dancers.
Total number of dancers will therefore be:
100/40*x=2.5x
When 15 more girls joined, the new number of girls was:
x+15 this represents the total percentage of 52%. The new number of dancers became:
2.5x+15:
therefore the new percentage of girls can be expressed as follows:
(new number of girls)/(new number of dancers)×100
(x+15)/(2.5x+15)×100=52
(x+15)/(2.5x+15)=0.52
x+15=0.52(2.5x+15)
x+15=1.3x+7.8
15-7.8=1.3x-x
7.2=0.3x
x=7.2/0.3=24
The number of students after additional number of girls will be:
2.5x+15
=2.5×24+15
=60+15
=75 students
The answer would be -40 / 3 or -13.3333333333
