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3 years ago

Please help, ik it looks easy but i cant do it, ill give brainliest

Mathematics

1 answer:

rjkz [21]3 years ago

8 0

Answer:

Step-by-step explanation:

$(m+\frac{1}{m})=3\\cubing both sides\\(m+\frac{1}[m})^{3} =3^{3} \\m^3+\frac{1}{m^3}+3 m*\frac{1}{m}(m+\frac{1}{m})=27\\m^3+\frac{1}{m^3}+3*3=27\\m^3+\frac{1}{m^3}=27-9=18$

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Help plz for brainliest

irina [24]

Answer:

0.95

Step-by-step explanation:

19/20 as a decimal is 0.95

3 0

3 years ago

Read 2 more answers

How do you write 820.62% as a decimal

AveGali [126]

Answer: 8.2062

Step-by-step explanation:

820.62%= 820.62/100

5 0

4 years ago

Angles α and β are the two acute angles in a right triangle. Use the relationship between sine and cosine to find the value of α

8_murik_8 [283]

Answer:

The value of angle α is 18 degree.

Step-by-step explanation:

Given information: Angles α and β are the two acute angles , α < β.

Given equation is

$\sin (2x-8)=\cos (6x-6)$

$\cos (90-(2x-8))=\cos (6x-6)$ $[\because \sin (90-x)=\cos x]$

Equating both sides.

$90-2x+8=6x-6$

$98+6=6x+2x$

$104=8x$

$13=x$

The value of x is 13.

The measure of angles is

$2x-8=2(13)-8=18$

$6x-6=6(13)-6=72$

Since 18<72, therefore the value of angle α is 18 degree.

8 0

4 years ago

Solve the formula A =1/2 b*h for h

12345 [234]

$A=\dfrac{1}{2}bh\ \ \ \ |multiply\ both\ sides\ by\ 2\\\\2A=bh\ \ \ \ |divide\ both\ sides\ by\ b\\\\\boxed{h=\frac{2A}{b}}$

6 0

4 years ago

Mr. Mole left his burrow and started digging his way down. AAA represents Mr. Mole's altitude relative to the ground (in meters)

julia-pushkina [17]

Answer:

Mr. Mole's burrow lie 7 meters below the ground.

Explanation:

The information given can be summarized as:

Mr Mole's altitude relative to the ground, in meters: A = - 2.3t - 7

Time, since Mr. Mole started digging, in minutes: t

Interpetration of the terms in the model A = -2.3t - 7

The equation A = -2.3t - 7 is a linear function, which consists of two terms:

The term -2.3t indicates that the altitude of Mr Mole decreases by 2.3 meters every minute. This is, -2.3 is the slope of the line in the graph that represents the altitude.

The constant term - 7 is the altitude at t = 0, because at t = 0 A = -2.3(0) - 7 = 0 - 7 = 0. This is, -7 is the intercept with the vertical axis in the graph that represents the altitude.

Thus, altitude at which Mr. Mole's burrow lie is the initial value given by the function, this is the altitude at t = 0, or the vertical intercept of the line; which, as just said is - 7. The negative sign tells that the value is below the ground (ground level is 0 meters). Then, Mr. Mole's burrow lie 7 meters below the ground.

7 0

4 years ago