Here are the four numbers. Keep them in this order:
18 2 4 3

Here are the tools in your toolbox:
parentheses, exponents (squared and cubed), multiplying, dividing, adding and subtracting.

Using the tools above, insert them between the numbers above to create the given values. Operations
may be used twice if necessary. Not all operations will be used in each expression.

Here is an example:
10 = 18 2 + 4-3

Listed below are the values you need to create
21 =
67 =
-6 =
103 =

21 = (18+4+18+2)/2

67 = (18*4+18+18+18+4+4)/2

-6 = (18+2)+4+4+2-18*2

103 = 18*4+18+2+4+3+4

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.

146%

step-by-step explanation: