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alexandr402 [8]
3 years ago
10

All books in a store are being discounted by 40%. let x represent the regular price of any book in the store which expression de

scribes the sale price of a book ?
Mathematics
1 answer:
antoniya [11.8K]3 years ago
6 0
To find the sale price<span> we can set up a proportion. 25/100 = </span>x<span>/48. We keep the 100 and 48 both on the bottom of the fraction since they </span>represent<span> the "whole". </span>x represents<span> the </span>discount<span> off the </span>full price<span> of the dress. To solve this proportion, we cross multiply, yielding 48 * 25 = 100x. Alternatively, </span>if<span> you notice that 25/100 ...</span>
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A boat travels with velocity vector (25, 25 StartRoot 3 EndRoot). What is the directional bearing of the boat? N 30° E E 30° S E
Lina20 [59]

Answer:

The directional bearing of the boat is N 30º E

Step-by-step explanation:

Let \vec v = (25, 25\sqrt{3}), where \vec v is the vector velocity. Given that such vector is represented in rectangular, a positive value in the first component is the value of the vector in the east direction, whereas a positive value in the second component is in the north direction. The directional bearing of the boat (\theta), measured in sexagesimal degrees, is determined by trigonometrical means:

\theta = \tan^{-1}\frac{v_{y}}{v_{x}} (1)

If we know that v_{x} = 25 and v_{y} = 25\sqrt{3}, then the directional bearing of the boat is:

\theta = \tan^{-1} \sqrt{3}

\theta = 60^{\circ}

In consequence, we conclude that the direction bearing of the boat is 30 degrees to the East from the North (N 30º E).

3 0
3 years ago
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Han and Priya were making a kite. Han cut out a piece of fabric so
Lemur [1.5K]

A kite is a <em>quadrilateral</em> which has <u>two</u> equal adjacent sides. Therefore <em>measuring</em> the lengths a<u>ccurately</u> would make the pieces of wood <em>perpendicular</em>. Since the diagonals of a kite are at <em>right angle</em> to each other.

<u>Quadrilaterals</u> are shapes which has four straight sides. Examples are; square, trapezium, kite, rectangle etc.

A <u>kite</u> is a shape which has <em>adjacent</em> sides to have equal lengths. It has two diagonals, and one <em>line of symmetry</em>.

The <em>lengths </em>of the sides of the <u>fabric</u> being exact imply that the pieces of wood would be perpendicular as suggested by Priya when fixed appropriately to the piece of fabric. This is because the diagonals of a <em>kite</em> are always <u>perpendicular</u>. Thus measuring the angles as suggested by Han is <u>not</u> necessary.

Visit: brainly.com/question/21979359

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Answer:

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Step-by-step explanation:

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