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3 years ago

Help! Cant figure out math question!

Mathematics

1 answer:

marta [7]3 years ago

3 0

X = - 0.09
x = 1.76

Are the two possible values for X

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Bob is trying to calculate the area of a triangle with a base of 5 meters and a height of 7 meters. He mistakenly switches the h

ehidna [41]

Answer:

see below

Step-by-step explanation:

A = 1/2 b*h

A = 1/2 (5*7)

We can use the commutative property of multiplication which states

a*b = b*a

A = 1/2 (7*5)

This will not affect the answer because 5*7 = 7*5

6 0

3 years ago

The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the pla

forsale [732]

Answer:

Speed at Equator = 463.97 meters per second

Centripetal Acceleration at Equator = $3.37*10^{-2}$ meters per second squared

Speed at 30 degrees north of equator = 401.79 meters per second

Centripetal Acceleration at 30 degrees north of equator = $2.92*10^{-2}$ meters per second squared

Step-by-step explanation:

The formula is:

$v=\frac{2 \pi R}{T}$

Where

v is speed

R is radius

T is time

and another formula for centripetal acceleration:

$a_c=\frac{4 \pi^{2} R}{T^2}$

Now,

at equator, the radius is radius of earth (given), time in seconds is

T = 24 * 60 * 60 = 86,400

THus,

$v_E=\frac{2 \pi (6.38*10^{6}}{86,400}=463.97$

Speed at Equator = 463.97 meters per second

Centripetal Acceleration:

$a_{cE}=\frac{v_E^2}{R_E}=\frac{463.97}{6.38*10^{6}}=3.37*10^{-2}$

Centripetal Acceleration at Equator = $3.37*10^{-2}$ meters per second squared

At 30.0° north of the equator:

$R_N=R_E Cos (30)= (6.38*10^6)Cos(30)=5.53*10^6$

Now,

Speed = $v_{30N}=\frac{2 \pi (5.53*10^6)}{86,400}=401.79$

Speed at 30 degrees north of equator = 401.79 meters per second

Centripetal Acceleration:

$a_{30N}=\frac{v_E^2}{R_E}=\frac{401.79}{5.53*10^6}=2.92*10^{-2}$

Centripetal Acceleration at 30 degrees north of equator = $2.92*10^{-2}$ meters per second squared

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3 years ago

What the awnser pls help

nikitadnepr [17]

it looks like its

1,1

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Maru [420]

Answer:

Step-by-step explanation:

parallel angles are equal:

so the equation is to equates each side

3x + 21 = 6x - 60

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The population of a bacteria colony doubles every hour. Which type of equation is most suitable for modeling the population of b

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I do not know. Ima go check I’ll be back

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