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3 years ago

Which of the following statements is true?

Mathematics

2 answers:

lozanna [386]3 years ago

7 0

Answer:

Step-by-step explanation:

its d since the sides of a rectangle have to be parralell with eachother

kramer3 years ago

3 0

Answer:

<h2>D) All rectangles are parallelograms.</h2>

Step-by-step explanation:

A) A trapezoid must have congruent sides. NO

<em>because all sides may have different lengths</em>

B) Every angle in a quadrilateral must be less than...

<em>Angles of quadrilateral can have different measures. </em>

<em>It is important that they meet the condition:</em>

<em>The angles in any quadrilateral add up to 360°. </em>

C) All rectangles are squares. NO

<em>All squares are rectangles. The square has all sides congruent. The rectangle has two pairs of congruent sides.</em>

<em />

D) All rectangles are parallelograms. YES

<em>All rectangles have two pairs of congruent and parallel sides</em>

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Graph the line that represents a proportional relationship between ddd and ttt with the property that an increase of 3 units in

Pepsi [2]

Answer:

a) The unit rate of change of d with respect to t is equal to 1.6

b) the graph of the line in the attached figure.

3 0

3 years ago

Read 2 more answers

Alex has a bag of marbles. Each marble is red, blue, or yellow , and the ratio of the red to blue to yellow marbles is 6:10:15.

lesantik [10]

Answer:

There are 150 blue marbles in Alex's bag.

Step-by-step explanation:

Let $x$ , $y$ , $z$ be the quantities of red, blue and yellow marbles, respectively. From statement we derive three rational equations for initial and final ratios:

Initial ratio

$\frac{x}{y} = \frac{6}{10}$ (1)

$\frac{y}{z} = \frac{10}{15}$ (2)

Final ratio

$\frac{x + 10}{z - 25} = \frac{1}{2}$ (3)

After some algebraic handling we get the following system of linear equations:

$x - \frac{3}{5}\cdot y = 0$ (1)

$y - \frac{2}{3}\cdot z = 0$ (2)

$2\cdot (x + 10) = z - 25$

$2\cdot x +20 = z - 25$

$2\cdot x - z = -45$ (3)

The solution of the system of linear equations is:

$x = 90$ , $y = 150$ , $z = 225$

There are 150 blue marbles in Alex's bag.

5 0

3 years ago

A part of the city of New Orleans is 6 feet below sea level. We can use "-6 feet" to describe its

andriy [413]

Answer:

[-8]

Step-by-step explanation:

6 0

3 years ago

What is cot, and tan

viktelen [127]

Answer:

tan and cot are trigonometric functions

7 0

3 years ago

Please help me answer this question

strojnjashka [21]

Answer:

modulus: 3√2
argument: -3π/4 (or 5π/4)

Step-by-step explanation:

The modulus is the magnitude of the complex number; the argument is its angle (usually in radians).

<h3>rectangular form</h3>

The complex number can be cleared from the denominator by multiplying numerator and denominator by its conjugate:

$\dfrac{-9+3i}{1-2i}=\dfrac{(-9+3i)(1+2i)}{(1-2i)(1+2i)}=\dfrac{-9+3i-18i-6}{1+4}=-3-3i$

<h3>polar form</h3>

The magnitude of this number is the root of the sum of the squares of the real and imaginary parts:

modulus = √((-3)² +(-3)²) = 3√2

The argument is the arctangent of the ratio of the imaginary part to the real part, taking quadrant into consideration.

arg = arctan(-3/-3) = -3π/4 or 5π/4 . . . . radians

modulus∠argument = (3√2)∠(-3π/4)

3 0

2 years ago