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2 years ago

10

A teacher knows that 80% of her students will score no more than 5 points above or below the class average, 85%, on the test. Wh

ich inequality represents the test scores of 80% of her students?

1 answer:

saul85 [17]2 years ago

8 0

Answer:

$|x-85| \leq 5$

Step-by-step explanation:

|x-85| represents the 'distance' of the test score than 85, and this distance must be less than or equal to 5.

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3 years ago

For the school play, the advance tickets cost $3, while tickets at the door cost $5. Thirty more tickets were sold at door in ad

Talja [164]

Answer:

<u>310</u> tickets were sold in advance before school pay and <u>340</u> door tickets were sold in advance.

Step-by-step explanation:

Given:

Let number of tickets sold in advance be 'x'.

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Cost of door tickets = $5

Also given:

Thirty more tickets were sold at door in advance

Hence number of door tickets sold = $x+30$

Total Money Collected = $2630

Now we can say that Total Money Collected is equal to sum of number of tickets sold in advance multiplied by Cost of advance ticket and number of door tickets sold multiplied by Cost of door tickets.

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Solving the equation to find the value of x we get;

$3x+5x+150=2630$

Combining the like terms we get;

$3x+5x=2630-150\\\\8x= 2480$

Now Dividing 8 on both side using division property we get;

$\frac{8x}{8} =\frac{2480}{8}\\ \\x=310$

Substituting the value of x to find number of door tickets been sold.

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Hence, <u>310</u> tickets were sold in advance before school pay and <u>340</u> door tickets were sold in advance.

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3 years ago