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3 years ago

If A/B and C/D are rational expressions, then which of the following is true?

Mathematics

1 answer:

Aleonysh [2.5K]3 years ago

6 0

Answer:

Step-by-step explanation:

A/B × D/C = A/B × D/C because when we divide a fractional number we need to turn the second expression upside down .

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Help pls its just math :( Ik it sucks I hate math too, pls help tho

Umnica [9.8K]

Answer:

x = - 1

Step-by-step explanation:

Given

- 4(3x - 7) = 40 ( divide both sides by - 4 )

3x - 7 = - 10 ( add 7 to both sides )

3x = - 3 ( divide both sides by 3 )

x = - 1

6 0

2 years ago

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Find the area of the shape. 19 yd 5 yd 6 yd 9 yd The area is

finlep [7]

Answer:

Step-by-step explanation:

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2 years ago

Sally finds a coin with a radius of 1.5 centimeters and a thickness of 0.25 cm. It has a measured mass of 18.54 grams. How can S

mote1985 [20]

Answer:

Silver

Step-by-step explanation:

Find the volume of the coin

Volume of a cylinder

$\textsf{V}=\sf \pi r^2 h \quad\textsf{(where r is the radius and h is the height)}$

Given:

r = 1.5 cm
h = 0.25 cm

Substituting given values into the formula to find the volume:

$\sf \implies V=\pi (1.5)^2(0.25)$

$\sf \implies V=0.5625 \pi \:cm^3$

Find the density of the coin given it has a measured mass of 18.54 g

Density formula

$\sf \rho=\dfrac{m}{V}$

where:

$\rho$ = density
m = mass
V = volume

Given:

m = 18.54 g
$\sf V=0.5625 \pi \:cm^3$

Substituting given values into the density formula:

$\implies \sf \rho=\dfrac{18.54}{0.5625 \pi}$

$\implies \sf \rho=10.49149385\:g\:cm^{-3}$

Given:

$\textsf{Density of Lead}=\sf 11.3\:g\:cm^{-3}$

$\textsf{Density of Silver}=\sf 10.49\:g\:cm^{-3}$

Therefore, as $\sf \rho=10.49\:g\:cm^{-3}$ the coin is made from silver.

4 0

1 year ago

What is the discriminant of the quadratic equation 3 – 4x = –6x2?

kogti [31]

3-4x=-6x^2
+6x^2=+6x^2
_____________
6x^2+3-4x=0
6x^2-4x+3=0

(-4)^2-4(6)(3)
16-72
Final Answer: -56

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3 years ago

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Drugs+Kids=.................. Very tough question guys

ycow [4]

Answer:

= desaster

Step-by-step explanation:

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2 years ago

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