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saveliy_v [14]
3 years ago
6

Need help due tomorrow plz help!!

Mathematics
1 answer:
Sonbull [250]3 years ago
6 0
1.) B

because it says the person buys a ski for 350. He puts down $110 which means to subtract. Now he got a discount which also means to subtract. Then it told that he gave 1/2 them money to his mother. So that too means to subtract. 

2.) 2+5n

because it says 2 plus 5 times a number. So 2+5×n 
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Alexeev081 [22]

Answer: Option A and Option D

Step-by-step explanation:

By definition the general equation of a circle has the following form

(x-h)^2+ (y-k)^2=r^2

Where r is the radius and the point (h, k) is the center of the circle

All points that are on the x axis have the following form:

(h, 0)

Therefore all the circles that have their centers on the x axis will have a value of k = 0.

Identify among the options all those equations that have a value of k = 0

The circles that have their center on the x axis are option A and option D

7 0
3 years ago
suppose an architect draws a segment on a scale drawing with the end points (0,0) and (3/4,9/10). the same segment on the actual
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Let the segment be represented by AB where A(0,0) = A(x_{1}, y_{1}) and B(3/4,9/10) = B(x_{2}, y_{2}).

The length of the segment drawn by architect can be calculated using distance formula:

AB =\sqrt{}( x_{2}- x_{1})^ {2} + (y_{2}- y_{1})^ {2}

AB=\sqrt{(3/4-0)^{2}+(9/10-0)^{2}

AB=\sqrt{9/16+81/100} \\

AB = (6\sqrt{61})/40

Similarly, Let the actual end points of segment be AC where A(0,0) = A(x_{1}, y_{1}) and C(30,36) = C(x_{2}, y_{2}).

The length of the original segment can be calculated using distance formula:

AC =\sqrt{}( x_{2}- x_{1})^ {2} + (y_{2}- y_{1})^ {2}

AC=\sqrt{(30-0)^{2}+(36-0)^{2}

AC=\sqrt{900+1296} \\

AC = (6\sqrt{61}).

Thus, the actual length is 40 times the length of the segment drawn by the architect.

Thus, the proportion of the model is 1:40

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