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chubhunter [2.5K]
2 years ago
10

Excellence Middle School charges $6.25 for students from all grade levels to attend the school dance. If S represents the number

of seventh grade students who came to the dance and g represents the number of eighth grade students at the dance, which expression BEST represents the total money collected for attending the dance.
a. 6.25s + g
b. 6.25(s + g)
c. 13.50(s + g)
d. 6.25(s + g)
Mathematics
1 answer:
vlabodo [156]2 years ago
6 0
The answer would be b: 6.25(s+g)

you can already cancel out c., as there’s no way it could be 13.50

since it says it’s $6.25 dollars for all grades and you would be trying to find both 7th and 8th graders, you would need to multiply both variables by the amount they need to pay. in this case, $6.25.
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Answer:

Option B.  The equation has a maximum value with a y-coordinate of -21.

Step-by-step explanation:

The correct quadratic equation is

y=-3x^{2}+12x-33

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Convert to vertex form

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y=-3(x^{2}-4x)-33

Complete the square

y=-3(x^{2}-4x+2^2)-33+12

y=-3(x^{2}-4x+4)-21

Rewrite as perfect squares

y=-3(x-2)^{2}-21

The vertex is the point (2,-21)

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3 years ago
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3 years ago
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Ne4ueva [31]

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Step-by-step explanation:

You can find the monthly rates by deducting the cost at 12 months from the cost at 24 months and dividing it by 12.

Club 1                                         Club 2                                 Club 3

= (432 - 216) / 12                       = (390 - 210) / 12                 = (504 - 252) / 12

= $18                                          = $15                                   = $21

Multiply these rates by 6 months and any club total cost at 6 month that differs from your answer has a joining fee.

Club 1;                                          Club 2;                                 Club 3

= 18 * 6                                         = 15 * 6                                = 21 * 6

= $108                                          = $90                                  = $126

<em>Same as total cost at              </em><u><em> Joining fee of $30</em></u><em>;      </em>         <em>No joining fee as </em>

<em>6 months so no joining            120 - 90 = $30                      this is the same </em>

<em>fee.                                                                                           as total cost at 6 </em>

<em>                                                                                                 months.</em>

5 0
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Step-by-step explanation:

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Jack said “5 times my age in 2 years is 100.” How old is jack now.
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Answer:

Jack is 18 years old

Step-by-step explanation:

100:5=20

20-2=<u>18</u>

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3 years ago
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