There is 150% increase in the number of volunteers.
Step-by-step explanation:
Given,
Old number of volunteers = 20
New number of volunteers = 50
Change = New value - Old value
Change = 50 - 20 = +30
The positive sign indicates the increase.
Percent increase = 
There is 150% increase in the number of volunteers.
Keywords: percentage, subtraction
Learn more about percentages at:
#LearnwithBrainly
Answer:
4/5
Step-by-step explanation:
You didn't really ask a question, so I'm assuming you want to know if there are any solutions to BOTH equations.
Use the first equation to substitute 4x - 1 for y in the second equation:
12x = 3(4x - 1)+7
12x = 12x - 3 + 7
12x = 12x +4
0 = 4
The last equation is FALSE, indicating the system of two equations has no solution.
Answer:
<em>a=$10</em>
<em>c=$3</em>
Step-by-step explanation:
Step one:
given data
let adults tickets be a
and child tickets be c
so
Roy's purchase
6a+2c=66------1
Elisa's purchase
5a+4c=62-------2
Hence, the system of equations
<em>6a+2c=66------1</em>
<em>5a+4c=62-------2</em>
<em>solving simultaneously</em>
<em>6a+2c=66------1 x2</em>
<em>5a+4c=62-------2 x1</em>
<em />
<em> 12a+4c=132</em>
<em> -5a+4c=62</em>
<em> 7a=70</em>
<em>divide both sides by 7</em>
<em>a=$10</em>
<em />
<em>put a=70 in 1</em>
<em>6(10)+2c=66------1</em>
<em>60+2c=66</em>
<em>2c=66-60</em>
<em>2c=6</em>
<em>c=$3</em>
