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3 years ago

??? Someone please help

Mathematics

2 answers:

salantis [7]3 years ago

6 0

the average speed is:

112.5

statuscvo [17]3 years ago

4 0

If you multiply 15 and 30 you would get 450, which is the total square footage.

then divide that by the total time, 4 hours, and you get 112.5 ft.

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Solve for x. 2x² +21x-61 = (x+7)² Please

Ymorist [56]

Answer:

$x = \frac{-7 +\sqrt{489} }{2}$

$x = \frac{-7 - \sqrt{489} }{2}$

Step-by-step explanation:

2x² +21x-61 = (x+7)²

expand

2x² + 21x - 61 = x² + 14x +49

move everything to one side

x² + 7x - 12 = 0

use quadratic formula

$x = \frac{-b +- \sqrt{b^{2}-4ac } }{2a}$

plug in the values

$x = \frac{-7 +- \sqrt{7^{2}-4(1)(-110) } }{2(1)}$

solve

$x = \frac{-7 +- \sqrt{49-4(1)(-110) } }{2}$

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A total of 326 adult and student tickets were sold for a high school play. The ticket prices were $8 for adults and $5 for stude

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Answer:

212 tickets were sold

Step-by-step explanation:

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7(3r - 1) - (r + 5) = -52 Please step by step help

MrMuchimi

7(3r-1)-(r+5)=-52

21r-7-r-5=-52

21r-r-5-7=-52

20r-12=-52

Add 12 to both sides

20r=-40

Divide by 20

r=-2

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