2) Today, the price of a pack of pens costs $12. In 2000, the same pack of pens only cost $8. What is the percent of change? 3) In Orlando, Florida the high temperature was 91 degrees on Saturday and on Sunday was 77 degrees. What is the percent of change? 4)Olivia scored 75 points on a math test. On the second math test, she earned 60 points. What is the percent of change?

2) 50  3) 18.18...  4) 25

Step-by-step explanation:

12 - 8

8

x 100% = 50%

91 - 77

77

x 100% = 18.1818181818%

75 - 60

60

x 100% = 25%

step-by-step explanation:

i have no idea

let soccer = x and golf = y

part a

1st equation: x + y = 125

2nd equation: x = y +45

part b

replace x in the 1st equation with the 2nd one:

y + 45 + y = 125

simplify:

2y + 45 = 125

subtract 45 from each side:

2y = 80

divide both sides by 2:

y = 80/2

y = 40

she plays golf for 40 minutes.

part c

no because she plays soccer for 45 minutes longer than golf 40 +45 =   85 minutes, not 80 minutes.