Why is the percent increase from 45 to 75 not equal to the percent decrease from 75 to 45? select three. the amount of change is different for the percent increase and the percent decrease. the ratio of the percent increase is not the same as the percent decrease. the ratio for the percent increase has a smaller denominator than the percent decrease. the ratio for the percent increase has a different numerator than the percent decrease. the ratio of the percent increase is the same as the percent decrease. the original amount for the percent increase is different from the original amount for the percent decrease.

Step-by-step explanation:

From 45 to 75:

We could calculate this using the rule of three. If 45 is 100%, 75 what percentage would be?

From 75 to 45:

We do the same process, but in the opposite way. If 75 represents 100%, 45 what percentage would be?

So, comparing both process we conclude that, both ratios are not the same, we judge this by watching is fraction, and each result. Also, the ratio for the percentage increase has lower denominator (45) than the percentage decrease (75). Lastly, the original amounts in each case is different, the increased started from 45, and the decreased started from 75.

answer: standard form is ax^2 + bx + c = 0

step-by-step explanation:

standard form is ax^2 + bx + c = 0

(2x + 1)(x - 2) = 0

distribute to get into standard form

2x^2 - 4x + x - 2 = 0

2x^2 - 3x - 2 = 0

a = 2, b= -3, c = -2

a is your answer

answer: 2 and 1

step-by-step explanation: got this question