So I'll start with the mixed number to improper fraction.
Step one - multiply the denominator and the whole number.
Step two- take your product and add it to the numerator
Step three- the sum is the numerator of the mixed number and the original denominator is the denominator
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Now for improper fraction to mixed number
Step one- see how many times the denominator goes into the numerator (ex. 2 goes into 9, 4 times With one left over)
Step two -the 4 becomes the whole number and the 1 the numerator
Step three- use the same denominator
Answer:
Jackhammer =$25
Discount= 18%
Final Price= $25*0.82*1.06 = $ 21.73
20 because of the whole is 40 and the shaded part is by 20 you just take half of 40 and you get 20
The slope of this line is the difference of the y values divided by the difference of the x values. Solving this give 4/-3. Then, you already know the b in y = mx+b, which is 2, because you already have the value (0, 2). So, the answer is y = 
x + 2
25% of something is 5000000, so total is 4*5000000 = 20 million
