3 years ago

50 Points!! please help (adding and subtracting polynomials)

Mathematics

1 answer:

raketka [301]3 years ago

7 0

Are you asking to find the perimeter of the polygons?

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7 times a number is 18 less than the square of that number. Find the positive solution.

Arte-miy333 [17]

So 7 x = x2 -18 so you get the quadratic x^2 -7x -18 and then get 2 x -9= -18 and 2 + -9 = -7 so you get (x + 2) ( x - 9) so the positive solution would be x-9 = 0 so x= 9. Hope this helps :)

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3 years ago

barb exercises for 22 hours each week. how many hours does she exercise in 14 weeks. use the array drawn on the grid go help mul

Paha777 [63]

Answer:

Step-by-step explanation:

22 times 14 is 308, so 308 hours in 14 weeks.

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2 years ago

Composite functions (Question in image)

Annette [7]

$f(0) = - 6 + 4 = - 2 \\ g( - 2) = 4$

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2 years ago

The mean weight 20 students in a room is 65 kg one student one student who weight is 88kg went into the room what is the new mea

umka2103 [35]

The new mean is 66.09

<u>Explanation:</u>

Mean weight of 20 students = 65kg

One student with 88kg entered the room.

New mean = ?

$\frac{x_1+x_2+....+x_2_0}{20} = 65$

$\frac{x_1+x_2+....+x_2_0 + 88}{21} = ?$

The above equation can further be written as:

$x_1 + x_2 +....+x_2_0 = 65 X 20\\\\x_1 + x_2 +....+x_2_0 = 1300$

New mean = $\frac{1300 + 88}{21}$

= 66.09

Therefore, the new mean is 66.09

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2 years ago

Which digit in the following number is the one that determines its precision? 183.6

mote1985 [20]

<span>precision is after the decimal point.

</span>

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2 years ago