The number of students in a chess club decreased from 20 to 11. What is the percent decrease? Round your answer to the nearest percent. Can someone pls help quickly with the right answers‍♀️

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  45%

Step-by-step explanation:

The percentage change is calculated using ...

  percent change = ((new value) - (old value))/(old value) × 100%

For your numbers ...

  percent change = (11 -20)/20 × 100% = -9/20 × 100% = -45%

The negative sign indicates the change is a decrease. Here, you're asked for the amount of decrease.

The percent decrease is 45%.

3. (5x + 1) - (-10x + 6)

simplify the answer choice. combine like terms. remember to distribute the negative to the terms inside the second parenthesis. also remember that two negatives = one positive, and one of each sign = negative.

- (-10x + 6) = + 10x - 6

simplify. combine like terms:

5x + 1 + 10x - 6

5x + 10x + 1 - 6

15x - 5

∴ it is your answer

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