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4 years ago

Can someone help me please

Mathematics

1 answer:

Licemer1 [7]4 years ago

8 0

Answer:

Step-by-step explanation:

$\text{The quadratic equation:}\ ax^2+bx+c=0.\\\\\text{We have}\ x^2-4x+2=0\\\\a=1,\ b=-4,\ c=2\\\\\text{Substitute to}\ b^2-4ac:\\\\b^2-4ac=(-4)^2-4(1)(2)=16-8=8$

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Find volume of sphere in cubic yards whose radius is 5 yard<br><br> Use pi = 3.14

enyata [817]

Answer:

523.333 cubic yards

Step-by-step explanation:

The formula for the volume of a sphere is $\frac{4}{3}\pi r^{3}$ where $r$ is the radius.

The radius of the given sphere is $r=5$ yards and $\pi =3.14$ .

Therefore, we can substitute in the radius and solve:

$V_{sphere}= \frac{4}{3}\*\times3.14\times 5^{3} =523.333$ cubic yards

4 0

2 years ago

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-Dominant- [34]

Ok so trata de ver la caja y contesta las preguntas que están ahí solo fíjate en la caja así es más fácil para completar las preguntas

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3 years ago

DIRECTIONS: Use this information to answer Parts A and B. Scientists measure temperature in degrees Celcius and in kelvin. A tem

nadya68 [22]

Answer:

$K = C + 273.15$

Step-by-step explanation:

We are given the following in the question:

"A temperature in kelvin is 273.15 greater than the temperature in degrees Celsius."

We have to write an equation that relates temperature K in Kelvin to temperature C in Celsius.

According to the given relation, we can write the equation:

$K = C + 273.15$

is the required equation that provides a relation between temperature in Kelvin and temperature i Celsius.

3 0

3 years ago

If m=(2x+1) and n=(6) and m+n=(9). Find x<br>

gregori [183]

Answer:

$\Large \boxed{x=1}$

Step-by-step explanation:

Substitute m=(2x+1) and n=(6) in m+n=(9).

We are finding the value of the x variable.

$2x+1+6=9$

Add the numbers on the left side of the equation.

$2x+7=9$

Subtract 7 from both sides.

$2x+7-7=9-7$

$2x=2$

Divide both sides by 2.

$\displaystyle \frac{2x}{2}=\frac{2}{2}$

$x=1$

The value of the x variable is 1.

7 0

3 years ago

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A certain forest covers an area of 4900 km². Suppose that each year this area decreases by 7%. What will the area be after 8 yea

RUDIKE [14]

Answer:

area after 8 years is 2156km²

Step-by-step explanation:

Area of forest=4900 km²

decrease in area in 1 year=4900km² × 7%

decrease in area in 1 year= 343km²

decrease area in 8 years=343km² × 8

=2744km²

Remaining area= (4900-2744)km²

=2156km²

Note:If you have any question about it please ask.

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3 years ago