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PtichkaEL [24]
2 years ago
6

Store has a price of $99 on an mp3 player. Store 2 is offering the same mp3 player at a sale price of 25% off their regular pric

e of $125. Jerusha wants to buy an mp3 player. From which store should she buy it
Mathematics
1 answer:
bonufazy [111]2 years ago
7 0

Answer:

Store 2

Step-by-step explanation:

Step 1 ) Convert 25% to a decimal : 0.25

Step 2 ) Multiply that by amount (0.25×125=31.25)

Step 3 ) Subtract from amount (125−31.25)=$93.75

93.75 is less than 99

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You forgot to include the given line.

We need the given line to find the slope. The slope of parallel lines are equal. So, the slope of the line of the equation you are looking for is the same slope of the given line.

I can explain you the procedure to help you to find the desired equation:

1) Slope

Remember that the slope-intercept equation form is y = mx + b where m is the slope and b is thye y-intercept.

If you clear y in every equation you get:

a) y = (3/4)x + 17/4 => slope = 3/4

b) y = (3/4)x + 20/4 = (3/4)x + 5 => slope = 3/4

c) y = -(4/3)x - 2/3 => slope = -4/3

d) y = (-4/3)x - 6/3 = (-4/3)x - 2 => slope = -4/3

So, you just have to compare the slope of the given line with the above slopes to see which equations are candidates.

2) Point (-3,2)

You  must verify which equations pass through the point (-3,2).

a) 3x - 4y = - 17

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b) 3x - 4y = - 20

- 17 ≠ - 20 => it is not candidate

c) 4x + 3y = - 2

4(-3) + 3(2) = - 2
-12 + 6 = - 2
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d) 4x + 3y = - 6

   -6 = - 6 => it is candidate

3) So, the point (-3,2) permits to select two candidates

3x - 4y = - 17, and 4x + 3y = -6.

4) Yet you have to find the slope of the given equation, if it is 3/4 the solutions is the equation 3x - 4y = -17; if it is -4/3 the solution is the equation 4x + 3y = -6.
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Sin = - 4/8

Quadrant IV = only cosine is positive

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