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3 years ago

Someone please help me quick!

Mathematics

1 answer:

Inessa [10]3 years ago

5 0

Can you explain the question in words please?

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Maggie wants to know how many students in her school enjoy watching sports on TV. She asks all 25 students in her math class and

RSB [31]

No, it is not a valid inference because her classmates do not make up a random sample of the students in the school.

6 0

2 years ago

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Kelvin has a shelf that is 9/2 feet long to display books. If displaying each book requires 3/4 feet, what is the maximum number

BaLLatris [955]

Kelvin can display 4 books.

7 0

3 years ago

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Classify this triangle by its sides and angles.

larisa [96]

Answer:

Right and isosceles

Step-by-step explanation:

Classification by sides: Isosceles because two sides are equal.

Classification by angles : Right angled triangle because one angle is 90°.

6 0

2 years ago

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Solve for x and y please!

galina1969 [7]

Answer:

$x = 8$

$y=2\sqrt{3}$

Step-by-step explanation:

The figure is composed of 3 Right triangles. To find the values of the variables x and y we use the Pythagorean theorem to propose one equation.

$x^2 =4^2 + (4\sqrt{3})^2$

Now we solve for x

$x=\sqrt{4^2 + (4\sqrt{3})^2}$

$x=\sqrt{16 +16*3}\\\\x=\sqrt{64}\\\\x=8$

Let's call z at the angle opposite to y

Then we have that:

$sin(z) =\frac{opposite}{hypotenuse}$

Where

$hypotenuse = 8$

$opposite=4$

$sin(z) =\frac{4}{8}$

$z=sin^{-1}(\frac{1}{2})$

$z=30$

Now we use this angle to find the length y

$sin(z) =\frac{opposite}{hypotenuse}$

Where in this case

$hypotenuse = 4\sqrt{3}$

$opposite=y$

$z=\°30$

$sin(30\°) =\frac{y}{4\sqrt{3}}$

$y=sin(30\°)*4\sqrt{3}$

$y=2\sqrt{3}$

6 0

3 years ago

Please help!! What is RS?

Reil [10]

Answer:

Step-by-step explanation:

RV=VU and SW=WT means $VW=\frac{RS+UT}{2}$

So:

$3x+5=\dfrac{2x+15+6x-37}{2} \\^{\qquad\times2\qquad\qquad\qquad\qquad\times2} \\6x+10=8x-22\\^{\qquad-10\qquad-10}\\6x=8x-32\\^{-8x\qquad-8x}\\-2x=-32\\^{\div(-2)\quad\div(-2)}\\x=16\\\\RS=2x+15=2\times16+15=32+15=47$

3 0

2 years ago