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White raven [17]
3 years ago
15

A pen cost y dollars,how much will 25 such pens cost

Mathematics
1 answer:
kiruha [24]3 years ago
3 0

Answer:

25y

Step-by-step explanation:

y×25=25y

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First you need to find the sum of all the interior angles using the formula (n-2)*180, where n is the number of sides.

There are 6 sides to this figure so the interior angles need to equal (6-2)*180 = 4*180 = 720.

Now add all the given angles together: 2x + 3x + 3x + 3x +3x +2x = 16x

Now we know 16X = 720

Find X by dividing both sides by 16:

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X = 45

Now we know X, so to find E, replace X with 45 and multiply by 3:

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In one minute, Evan can do nine less than four times the number of push-ups that Lucy can do. if they did 61 push-ups in all, ho
vagabundo [1.1K]

Evan does 33 more push-ups than Lucy

let x be the number of push-ups Lucy does , then

Evan does 4x - 9 push-ups

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hence x + 4x - 9 = 61 has to be solved

that is 5x - 9 = 61

add 9 to both sides

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divide both sides by 5

x = \frac{70}{5} = 14

Lucy does 14 push-ups and Evan does 4x - 9 =(4 × 14) - 9 = 47

Thus Evan does 47 - 14 = 33 more push-ups than Lucy

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3 years ago
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if an equation has the same slope and y intercept the equations will have infinite many solutions. If both equations have the same slope but different y intercept the equations will have no solutions. if both equations are positive or negative and have different slopes and different y intercepts then they will most likely have one solution. (example: y=-2x+3 and y= -4x+4, both slopes are negative so there will be one solution, same goes for if both slopes are positive.

Hope this helps!


3 0
3 years ago
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